645160 has 24 divisors (see below), whose sum is σ = 1463130. Its totient is φ = 256032.

The previous prime is 645149. The next prime is 645179. The reversal of 645160 is 61546.

It can be written as a sum of positive squares in only one way, i.e., 580644 + 64516 = 762^2 + 254^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5017 + ... + 5143.

2⁶⁴⁵¹⁶⁰ is an apocalyptic number.

It is an amenable number.

645160 is an abundant number, since it is smaller than the sum of its proper divisors (817970).

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

645160 is a wasteful number, since it uses less digits than its factorization.

645160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 645160 is about 803.2185256828. The cubic root of 645160 is about 86.4083696739.

The spelling of 645160 in words is "six hundred forty-five thousand, one hundred sixty".