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Properties of the Number 75

Seventy-Five

Basics

Value: 74 → 75 → 76

Parity: odd

Prime: No

Previous Prime: 73

Next Prime: 79

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 2

Divisors: 1, 3, 5, 15, 25, 75

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1001011

Octal: 113

Duodecimal: 63

Hexadecimal: 4b

Square: 5625

Square Root: 8.660254037844387

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

The positive integers. Also called the natural numbers, the whole numbers or the counting numbers, but these terms are ambiguous. A27
The odd numbers: a(n) = 2·n + 1. A5408
The composite numbers: numbers n of the form x·y for x > 1 and y > 1. A2808
Completely multiplicative with a(prime(k)) = prime(k+1). A3961
The nonnegative integers. A1477
Remove all factors of 2 from n; or largest odd divisor of n; or odd part of n. A265
Primorial base exp-function: digits in primorial base representation of n become the exponents of successive prime factors whose product a(n) is. A276086
Numbers that are not squarefree. Numbers that are divisible by a square greater than 1. The complement of A005117. A13929
Fubini numbers: number of preferential arrangements of n labeled elements; or number of weak orders on n labeled elements; or number of ordered partitions of [n]. A670
Read n backwards (referred to as R(n) in many sequences). A4086

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