Properties of the Number 21325

Twenty-One Thousand Three Hundred Twenty-Five

Basics

Value: 21324 → 21325 → 21326

Parity: odd

Prime: No

Previous Prime: 21323

Next Prime: 21341

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 5 ² × 853

Divisors: 1, 5, 25, 853, 4265, 21325

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001101001101

Octal: 51515

Duodecimal: 10411

Hexadecimal: 534d

Square: 454755625

Square Root: 146.03081866510234

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

a(n) = decimal equivalent of A215254(n). A215253

E.g.f.: ∑_n>=0 (exp(n·x) + 1)ⁿ / (2 + exp(n·x))ⁿ⁺¹. A302700

a(n) = n·xⁿ + (n-1)*x^n-1 + . . . + x + 1 for x=3. A88581

a(n) = (n³ - n + 15)/3. A155757

Base-8 palindromes that start with 5. A43025

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (-1, 0, 1), (0, -1, 0), (0, 0, -1), (1, 1, 1)}. A149758

Odd primes p such that Pi_3,1(p) = Pi_3,2(p) - 1, where Pi_m,n(p) denotes the number of primes q <= p with q == n (mod m). A98044

Decimal expansion of 1/321. A21325

Kekulé numbers for certain benzenoids. A108680