Properties of the Number 78547

Seventy-Eight Thousand Five Hundred Forty-Seven

Basics

Value: 78546 → 78547 → 78548

Parity: odd

Prime: No

Previous Prime: 78541

Next Prime: 78553

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 7 ³ × 229

Divisors: 1, 7, 49, 229, 343, 1603, 11221, 78547

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011001011010011

Octal: 231323

Duodecimal: 39557

Hexadecimal: 132d3

Square: 6169631209

Square Root: 280.26237706834644

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

The first of two consecutive pentagonal numbers the sum of which is equal to the sum of two consecutive primes. A298463

Pentagonal numbers (A000326) in which parity of digits alternates. A297644

Pentagonal numbers (A000326) whose digit reversal is a prime. A115707

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 59 ones. A31827

Pentagonal numbers which are the arithmetic mean of two consecutive primes. A234531

Numbers m such that gcd(s1,s2) = number of the Collatz iterations of m where s1 is the sum of the odd terms and s2 the sum of the even terms in the Collatz trajectory. A281195

a(n) = lcm(n, A052429(n)) - n. A78547