3981025 has 12 divisors (see below), whose sum is σ = 5022000. Its totient is φ = 3129680.

The previous prime is 3981017. The next prime is 3981037. The reversal of 3981025 is 5201893.

3981025 = 53² + 54² + ... + 229².

It is not a de Polignac number, because 3981025 - 2³ = 3981017 is a prime.

3981025 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3980984 and 3981002.

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, 126 + ... + 2824.

It is an arithmetic number, because the mean of its divisors is an integer number (418500).

Almost surely, 2^3981025 is an apocalyptic number.

It is an amenable number.

3981025 is a deficient number, since it is larger than the sum of its proper divisors (1040975).

3981025 is a wasteful number, since it uses less digits than its factorization.

3981025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768 (or 2763 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 3981025 is about 1995.2506108256. The cubic root of 3981025 is about 158.4886994501.

The spelling of 3981025 in words is "three million, nine hundred eighty-one thousand, twenty-five".