3121925 has 12 divisors (see below), whose sum is σ = 3901536. Its totient is φ = 2478000.

The previous prime is 3121913. The next prime is 3121927. The reversal of 3121925 is 5291213.

3121925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3121925 - 2²⁰ = 2073349 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3121925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3362 + ... + 4188.

It is an arithmetic number, because the mean of its divisors is an integer number (325128).

Almost surely, 2^3121925 is an apocalyptic number.

It is an amenable number.

3121925 is a deficient number, since it is larger than the sum of its proper divisors (779611).

3121925 is a wasteful number, since it uses less digits than its factorization.

3121925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988 (or 983 counting only the distinct ones).

The product of its digits is 540, while the sum is 23.

The square root of 3121925 is about 1766.8969975638. The cubic root of 3121925 is about 146.1529172823.

The spelling of 3121925 in words is "three million, one hundred twenty-one thousand, nine hundred twenty-five".