3921449625 has 128 divisors (see below), whose sum is σ = 7694069760. Its totient is φ = 1967328000.

The previous prime is 3921449603. The next prime is 3921449627. The reversal of 3921449625 is 5269441293.

3921449625 is a `hidden beast` number, since 3 + 9 + 2 + 14 + 4 + 9 + 625 = 666.

It is not a de Polignac number, because 3921449625 - 2⁸ = 3921449369 is a prime.

It is a super-2 number, since 2×3921449625² = 30755534322825281250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (3921449627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3870619 + ... + 3871631.

It is an arithmetic number, because the mean of its divisors is an integer number (60109920).

Almost surely, 2^3921449625 is an apocalyptic number.

It is an amenable number.

3921449625 is a deficient number, since it is larger than the sum of its proper divisors (3772620135).

3921449625 is a wasteful number, since it uses less digits than its factorization.

3921449625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1089 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 3921449625 is about 62621.4789429314. The cubic root of 3921449625 is about 1576.9413702251.

The spelling of 3921449625 in words is "three billion, nine hundred twenty-one million, four hundred forty-nine thousand, six hundred twenty-five".