3129625 has 8 divisors (see below), whose sum is σ = 3905928. Its totient is φ = 2503600.

The previous prime is 3129619. The next prime is 3129629. The reversal of 3129625 is 5269213.

3129625 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 4 ways, for example, as 143641 + 2985984 = 379^2 + 1728^2 .

It is not a de Polignac number, because 3129625 - 2³ = 3129617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3129593 and 3129602.

It is not an unprimeable number, because it can be changed into a prime (3129629) 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 7 ways as a sum of consecutive naturals, for example, 12394 + ... + 12643.

It is an arithmetic number, because the mean of its divisors is an integer number (488241).

Almost surely, 2^3129625 is an apocalyptic number.

It is an amenable number.

3129625 is a deficient number, since it is larger than the sum of its proper divisors (776303).

3129625 is an equidigital number, since it uses as much as digits as its factorization.

3129625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25052 (or 25042 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 3129625 is about 1769.0746168548. The cubic root of 3129625 is about 146.2729771287.

The spelling of 3129625 in words is "three million, one hundred twenty-nine thousand, six hundred twenty-five".