Properties of the Number 3725

Three Thousand Seven Hundred Twenty-Five

Basics

Value: 3724 → 3725 → 3726

Parity: odd

Prime: No

Previous Prime: 3719

Next Prime: 3727

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 ² × 149

Divisors: 1, 5, 25, 149, 745, 3725

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111010001101

Octal: 7215

Duodecimal: 21A5

Hexadecimal: e8d

Square: 13875625

Square Root: 61.032778078668514

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

a(n) = 4*(n+1)*n + 5. A78370

Partial sums of A000009 (partitions into distinct parts). A36469

Pentagonal numbers with even index. A49452

Number of 2's in the last section of the set of partitions of n. A182712

Sum of first k numbers in column k of the natural number array A000027; by antidiagonals. A185787

a(n) = ∑_k=0..n (-1)^n-k*A000041(k). A87787

The number of regions formed when every pair of n points, placed at the vertices of a regular n-gon, are connected by a circle and where the points lie at the ends of the circle's diameter. A358782

Write log(2) as a binary fraction; read this from left to right and whenever a 1 appears, note the integer formed by reading leftwards from that 1. A99974

a(n) = n! * ∑_k=0..n Bell(k)/k! (cf. A000110). A101053

Positions of ones in A264977; positions of twos in A277330. A277701