3925645 has 4 divisors (see below), whose sum is σ = 4710780. Its totient is φ = 3140512.

The previous prime is 3925637. The next prime is 3925667. The reversal of 3925645 is 5465293.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1042441 + 2883204 = 1021^2 + 1698^2 .

It is a cyclic number.

It is not a de Polignac number, because 3925645 - 2³ = 3925637 is a prime.

It is a super-3 number, since 3×3925645³ (a number of 21 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3925645.

It is a congruent number.

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, 392560 + ... + 392569.

It is an arithmetic number, because the mean of its divisors is an integer number (1177695).

Almost surely, 2^3925645 is an apocalyptic number.

It is an amenable number.

3925645 is a deficient number, since it is larger than the sum of its proper divisors (785135).

3925645 is an equidigital number, since it uses as much as digits as its factorization.

3925645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785134.

The product of its digits is 32400, while the sum is 34.

The square root of 3925645 is about 1981.3240522439. The cubic root of 3925645 is about 157.7503534994.

The spelling of 3925645 in words is "three million, nine hundred twenty-five thousand, six hundred forty-five".