645296 has 20 divisors (see below), whose sum is σ = 1291584. Its totient is φ = 312000.

The previous prime is 645257. The next prime is 645313. The reversal of 645296 is 692546.

645296 = 129² + 130² + ... + 159².

645296 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 645296.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155 + ... + 1146.

2⁶⁴⁵²⁹⁶ is an apocalyptic number.

It is an amenable number.

645296 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645296 is a wasteful number, since it uses less digits than its factorization.

645296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340 (or 1334 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 645296 is about 803.3031806236. The cubic root of 645296 is about 86.4144408875.

The spelling of 645296 in words is "six hundred forty-five thousand, two hundred ninety-six".