Properties of the Number -7239

Two Hundred Thirty-Nine

Basics

Value: -7240 → -7239 → -7238

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 19 × 127

Divisors: 1, 3, 19, 57, 127, 381, 2413, 7239

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1110001000111

Octal: -16107

Duodecimal: -4233

Hexadecimal: -1c47

Square: 52403121

Square Root: 85.08231308562314

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) = n³ + n² + n. A27444

Numbers k such that 1 + ∑_i=1..k 2^2·i-1 is prime. A127936

T(n,k)=Number of n X k nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal, diagonal or antidiagonal neighbor (colorings ignoring permutations of colors). A208096

Numbers n such that nextprime(n³)-prevprime(n³) = 4. A90121

Number of 2-colored generalized Frobenius partitions. A51136

Start with 1013 and repeatedly reverse the digits and add 2 to get the next term. A120214

Numbers k such that (k³ - 2, k³ + 2) is a pair of cousin primes (see A178227). A178228

Expansion of φ(x) / f(-x⁴)² in powers of·where φ(), f() are Ramanujan θ functions. A137828

a(n) = -3·a(n-1) + a(n-3), with a(0)=0, a(1)=-3, a(2)=12. A215919

Numbers that yield a prime when prime(k+2) is inserted after the k-th digit (or prime(1) = 2 before the 1st digit for k=0), for 0 <= k <= number of digits. A304243