Properties of the Number 78157

Seventy-Eight Thousand One Hundred Fifty-Seven

Basics

Value: 78156 → 78157 → 78158

Parity: odd

Prime: Yes

Previous Prime: 78139

Next Prime: 78163

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 78157

Divisors: 1, 78157

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011000101001101

Octal: 230515

Duodecimal: 39291

Hexadecimal: 1314d

Square: 6108516649

Square Root: 279.56573466717987

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

Primes formed by concatenating k and 2k+1. A309808

Primes p such that the differences between the 5 consecutive primes starting with p are (6,4,6,6). A78964

Prime p1 of the form a^b + c^d = p1, where a, b, c, d are primes and a + b + c + d = p2, where p2 (A164078) is prime and conc(abcd) = p3 (concatenation of a, b, c , d) is also prime (A164079). A164077

Primes of the form 5^x + y⁵ with x, y > 0. A250842

Numbers z such that x² + y⁷ = z² (with positive integers·and y) and gcd(x, y, z) = 1. A293693

a(n) = ∑_{p∣n, p prime} p^sopf(n/p). A369912

Prime p1 of the form a^b + c^d = p1, where a, b, c, d are primes and a + b + c + d = p2, where p2 (A164076) is also prime. A164075

Primes such that moving the last digit to the front produces a triangular number. A384954

Prime p of the form a^b + c^d = p, where a, b, c, d are also primes. A164074

a(n) = A078152(2ⁿ). A78157