6642925 has 6 divisors (see below), whose sum is σ = 8237258. Its totient is φ = 5314320.

The previous prime is 6642919. The next prime is 6642991. The reversal of 6642925 is 5292466.

It can be written as a sum of positive squares in 3 ways, for example, as 1920996 + 4721929 = 1386^2 + 2173^2 .

It is not a de Polignac number, because 6642925 - 2³ = 6642917 is a prime.

It is a Duffinian number.

6642925 is a lucky number.

It is a congruent number.

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, 132834 + ... + 132883.

Almost surely, 2^6642925 is an apocalyptic number.

It is an amenable number.

6642925 is a deficient number, since it is larger than the sum of its proper divisors (1594333).

6642925 is a wasteful number, since it uses less digits than its factorization.

6642925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265727 (or 265722 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 6642925 is about 2577.3872429264. The cubic root of 6642925 is about 187.9835223977.

The spelling of 6642925 in words is "six million, six hundred forty-two thousand, nine hundred twenty-five".