3129925 has 6 divisors (see below), whose sum is σ = 3881138. Its totient is φ = 2503920.

The previous prime is 3129923. The next prime is 3129937. The reversal of 3129925 is 5299213.

3129925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 25281 + 3104644 = 159^2 + 1762^2 .

It is not a de Polignac number, because 3129925 - 2¹ = 3129923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3129923) 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 5 ways as a sum of consecutive naturals, for example, 62574 + ... + 62623.

Almost surely, 2^3129925 is an apocalyptic number.

It is an amenable number.

3129925 is a deficient number, since it is larger than the sum of its proper divisors (751213).

3129925 is a wasteful number, since it uses less digits than its factorization.

3129925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125207 (or 125202 counting only the distinct ones).

The product of its digits is 4860, while the sum is 31.

The square root of 3129925 is about 1769.1594049152. The cubic root of 3129925 is about 146.2776507974.

The spelling of 3129925 in words is "three million, one hundred twenty-nine thousand, nine hundred twenty-five".