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Properties of the Number 25400

Twenty-Five Thousand Four Hundred

Basics

Value: 25399 → 25400 → 25401

Parity: even

Prime: No

Previous Prime: 25391

Next Prime: 25409

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 3 × 5 2 × 127

Divisors: 1, 2, 4, 5, 8, 10, 20, 25, 40, 50

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110001100111000

Octal: 61470

Duodecimal: 12848

Hexadecimal: 6338

Square: 645160000

Square Root: 159.37377450509229

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of achiral polyomino rings of length 4n with fourfold rotational symmetry. A324409
Triangle read by rows: number of set partitions of n elements with k circular connectors. A185983
Number of n element multisets of the 10th roots of unity with zero sum. A321416
Numbers k such that φ(φ(k)) = σ(rad(k)). A173748
Number of nX5 0..2 arrays with no element unequal to a strict majority of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A279899
a(0) = 1; a(n) = ∑k=1..n (-1)k+1*sigma2(k+1)*a(n-k), where sigma2() is the sum of squares of divisors (A001157). A307242
E.g.f. satisfies A(x) = (1 + x)2·A(x). A355780
Numbers n such that 2·n*k(n) is rational but not an integer, where k(n) is sum of successive remainders when computing the Euclidean algorithm for (1, 1/sqrt(n)) as defined in A086378 (MuPAD program is given there); numbers belonging to A086378 but not to A088900. A87414
Numbers that are the sum of 3 distinct positive cubes in exactly 2 ways. A25400
T(n,k)=Number of nXk 0..2 arrays with no element unequal to a strict majority of its king-move neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A279902