Properties of the Number 61075

Sixty-One Thousand Seventy-Five

Basics

Value: 61074 → 61075 → 61076

Parity: odd

Prime: No

Previous Prime: 61057

Next Prime: 61091

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 ² × 7 × 349

Divisors: 1, 5, 7, 25, 35, 175, 349, 1745, 2443, 8725

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1110111010010011

Octal: 167223

Duodecimal: 2B417

Hexadecimal: ee93

Square: 3730155625

Square Root: 247.13356712514795

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

Numbers k such that k | 7^k + 7. A15893

Cyclops triangular numbers. A160717

Odd triangular numbers with prime indices. A34954

a(1) = 1; a(n) is the smallest triangular number > a(n-1) which differs from it at every digit. A68855

Number of polyiamonds with n cells that do not tile the plane. A71333

a(1) = 1, a(n+1)= smallest triangular number greater than the n-th partial sum. A76971

Triangular numbers p*(p+1)/2 with p prime such that 1+(number of prime factors of p+1) is prime. A144549

Strong pseudoprimes to base 51. A20277

Numbers n which are concatenations n=x//y such that x²+y³ is a multiple of n. A162464

a(n) = n*(n+1)*(9·n² - n - 5)/6. A172075