Properties of the Number 3721

Three Thousand Seven Hundred Twenty-One

Basics

Value: 3720 → 3721 → 3722

Parity: odd

Prime: No

Previous Prime: 3719

Next Prime: 3727

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 61 ²

Divisors: 1, 61, 3721

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111010001001

Octal: 7211

Duodecimal: 21A1

Hexadecimal: e89

Square: 13845841

Square Root: 61

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

Squares of primes. A1248

Numbers k such that (16·10^k - 31)/3 is prime. A270929

Odd squares: a(n) = (2n+1)². Also centered octagonal numbers. A16754

1 and the prime powers p^m where m >= 2, thus excluding the primes. A25475

Prime powers p^e where p is a prime and e >= 2 (prime powers without the primes or 1). A246547

Number of partitions of n whose mean is a part. A237984

Squarefree numbers squared. A62503

Number of partitions of n in which no part occurs just once. A7690

Numbers of the form p^e where both p and e are prime numbers. A53810

Number of integer partitions of n containing three parts (a,b,c) (repeats allowed) such that a + b = c. A variation of sum-full partitions. A363225