3925649 has 16 divisors (see below), whose sum is σ = 4878720. Its totient is φ = 3075840.

The previous prime is 3925637. The next prime is 3925667. The reversal of 3925649 is 9465293.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3925649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3925699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16169 + ... + 16409.

It is an arithmetic number, because the mean of its divisors is an integer number (304920).

Almost surely, 2^3925649 is an apocalyptic number.

It is an amenable number.

3925649 is a deficient number, since it is larger than the sum of its proper divisors (953071).

3925649 is a wasteful number, since it uses less digits than its factorization.

3925649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440.

The product of its digits is 58320, while the sum is 38.

The square root of 3925649 is about 1981.3250616696. The cubic root of 3925649 is about 157.7504070788.

The spelling of 3925649 in words is "three million, nine hundred twenty-five thousand, six hundred forty-nine".