3978025 has 12 divisors (see below), whose sum is σ = 5054364. Its totient is φ = 3104000.

The previous prime is 3977999. The next prime is 3978031. The reversal of 3978025 is 5208793.

It can be written as a sum of positive squares in 6 ways, for example, as 488601 + 3489424 = 699^2 + 1868^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3978025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 916 + ... + 2965.

It is an arithmetic number, because the mean of its divisors is an integer number (421197).

Almost surely, 2^3978025 is an apocalyptic number.

It is an amenable number.

3978025 is a deficient number, since it is larger than the sum of its proper divisors (1076339).

3978025 is a wasteful number, since it uses less digits than its factorization.

3978025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3932 (or 3927 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 3978025 is about 1994.4986838802. The cubic root of 3978025 is about 158.4488784173.

The spelling of 3978025 in words is "three million, nine hundred seventy-eight thousand, twenty-five".