Properties of the Number 7725

Seven Thousand Seven Hundred Twenty-Five

Basics

Value: 7724 → 7725 → 7726

Parity: odd

Prime: No

Previous Prime: 7723

Next Prime: 7727

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 ² × 103

Divisors: 1, 3, 5, 15, 25, 75, 103, 309, 515, 1545

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1111000101101

Octal: 17055

Duodecimal: 4579

Hexadecimal: 1e2d

Square: 59675625

Square Root: 87.89197915623473

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

Recurrence a(n+2) = ∑_k=0..n binomial(n,k)*a(k)*a(n+1-k) with a(0)=3, a(1)=-1. A289067

T(n,k)=Number of nXk 0..2 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other. A200777

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000111. A260070

Convolution of sequence of primes with sequence σ(n). A86718

Number of n-element posets which are unions of 2 chains. A6251

McKay-Thompson series of class 24F for Monster. A58576

McKay-Thompson series of class 24d for Monster. A58587

Square spiral sequence: numbers are placed in a square spiral, a(1)=1, a(n) is found as the sum of the row (in the previous direction) a(n-1) is in. A62410

a(n) = floor(n·exp(-sec(n))). A134911

Row sums of triangle A173302. A173303