Properties of the Number 78125

Seventy-Eight Thousand One Hundred Twenty-Five

Basics

Value: 78124 → 78125 → 78126

Parity: odd

Prime: No

Previous Prime: 78121

Next Prime: 78137

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 ⁷

Divisors: 1, 5, 25, 125, 625, 3125, 15625, 78125

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011000100101101

Octal: 230455

Duodecimal: 39265

Hexadecimal: 1312d

Square: 6103515625

Square Root: 279.5084971874737

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Powers of 5: a(n) = 5ⁿ. A351

Seventh powers: a(n) = n⁷. A1015

The powertrain or power train map: Powertrain(n): if abcd... is the decimal expansion of a number n, then the powertrain of n is the number n' = a^b*c^d* ..., which ends in an exponent or a base according as the number of digits is even or odd. a(0) = 0 by convention. A133500

a(n) = prime(n)⁷. A92759

Dispersion of A008587 (5,10,15,20,25,30,...), by antidiagonals. A191702

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of 0^n-1 as Sum(k=0..n)T(n,k)*binomial(n,k). A244128

Numbers of the form 5ⁱ*7^j with i, j >= 0. A3595

Triangle read by rows: T(n,k) = kⁿ, n >= 1, 1 <= k <= n. A89072

Prime powers p^e where p is a prime and e >= 3 (prime powers without 1, the primes, or the squares of primes). A246549

Numbers of the form 5ⁱ * 11^j. A3598