Properties of the Number 42525

Forty-Two Thousand Five Hundred Twenty-Five

Basics

Value: 42524 → 42525 → 42526

Parity: odd

Prime: No

Previous Prime: 42509

Next Prime: 42533

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁵ × 5 ² × 7

Divisors: 1, 3, 5, 7, 9, 15, 21, 25, 27, 35

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1010011000011101

Octal: 123035

Duodecimal: 20739

Hexadecimal: a61d

Square: 1808375625

Square Root: 206.2159062730128

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

Triangle of Stirling numbers of the second kind, S2(n,k), n >= 1, 1 <= k <= n. A8277

Triangle of Stirling numbers of 2nd kind, S(n,k), n >= 0, 0 <= k <= n. A48993

Stirling numbers of second kind S(2n,n). A7820

Reflected triangle of Stirling numbers of 2nd kind, S(n,n-k+1), n >= 1, 1 <= k <= n. A8278

Stirling numbers of the second kind, S(n,5). A481

Numbers with exactly 3 distinct odd prime divisors {3,5,7}. A147576

T(n, m), denominators of coefficients in a power/Fourier series expansion of the plane pendulum's exact phase space trajectory. A273507

T(n,m), denominators of coefficients in a power/Fourier series expansion of the plane pendulum's exact differential time dependence. A274078

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements. A251249

Largest Stirling numbers of second kind: a(n) = max_k=1..n S2(n,k). A2870