645092 has 12 divisors (see below), whose sum is σ = 1290240. Its totient is φ = 276456.

The previous prime is 645091. The next prime is 645097. The reversal of 645092 is 290546.

645092 is an admirable number.

It is a super-2 number, since 2×645092² = 832287376928, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 645092.

It is not an unprimeable number, because it can be changed into a prime (645091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11492 + ... + 11547.

It is an arithmetic number, because the mean of its divisors is an integer number (107520).

2⁶⁴⁵⁰⁹² is an apocalyptic number.

It is an amenable number.

645092 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.

645092 is a wasteful number, since it uses less digits than its factorization.

645092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23050 (or 23048 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 645092 is about 803.1761948664. The cubic root of 645092 is about 86.4053337471.

The spelling of 645092 in words is "six hundred forty-five thousand, ninety-two".