Properties of the Number 61725

Sixty-One Thousand Seven Hundred Twenty-Five

Basics

Value: 61724 → 61725 → 61726

Parity: odd

Prime: No

Previous Prime: 61723

Next Prime: 61729

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 ² × 823

Divisors: 1, 3, 5, 15, 25, 75, 823, 2469, 4115, 12345

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1111000100011101

Octal: 170435

Duodecimal: 2B879

Hexadecimal: f11d

Square: 3809975625

Square Root: 248.4451649760969

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 obtained by adding the first k repdigits that consist of the same digit, for some number k. A346535

Partial sums of repdigits of A002279. A99672

Number of length n 0..3 arrays with new values introduced in order from both ends, and least squares fitting to a straight line with slope zero, with a single point taken as having zero slope. A245846

Number of length n+3 0..4 arrays with every four consecutive terms having the maximum of some two terms equal to the minimum of the remaining two terms. A249703

If n = D0·10⁰ + D1·10¹ + D2·10² + .. + Dk·10^k define f(n) = D0·0¹⁰ + D1·1¹⁰ + D2·2¹⁰ + .. + Dk·k¹⁰ (e.g. if n = 421 then f(n) = 4·2¹⁰ + 2·1¹⁰ + 1·0¹⁰ = 4098). Sequence gives values of n such that f(n) is divisible by n. A65110

T(n,k)=Number of length n+3 0..k arrays with every four consecutive terms having the maximum of some two terms equal to the minimum of the remaining two terms. A249707

T(n,k)=Number of length n 0..k arrays with new values introduced in order from both ends, and least squares fitting to a straight line with slope zero, with a single point taken as having zero slope. A245851

p² + 2 where p is a prime. A61725