3891025 has 24 divisors (see below), whose sum is σ = 5160384. Its totient is φ = 2904000.

The previous prime is 3890981. The next prime is 3891037. The reversal of 3891025 is 5201983.

It is a de Polignac number, because none of the positive numbers 2^k-3891025 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3890984 and 3891002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38475 + ... + 38575.

It is an arithmetic number, because the mean of its divisors is an integer number (215016).

Almost surely, 2^3891025 is an apocalyptic number.

It is an amenable number.

3891025 is a deficient number, since it is larger than the sum of its proper divisors (1269359).

3891025 is a wasteful number, since it uses less digits than its factorization.

3891025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 196 counting only the distinct ones).

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

The square root of 3891025 is about 1972.5681230315. The cubic root of 3891025 is about 157.2852536504.

The spelling of 3891025 in words is "three million, eight hundred ninety-one thousand, twenty-five".