3125390825 has 6 divisors (see below), whose sum is σ = 3875484654. Its totient is φ = 2500312640.

The previous prime is 3125390783. The next prime is 3125390833. The reversal of 3125390825 is 5280935213.

It can be written as a sum of positive squares in 3 ways, for example, as 84860944 + 3040529881 = 9212^2 + 55141^2 .

It is not a de Polignac number, because 3125390825 - 2¹⁶ = 3125325289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62507792 + ... + 62507841.

It is an arithmetic number, because the mean of its divisors is an integer number (645914109).

Almost surely, 2^3125390825 is an apocalyptic number.

It is an amenable number.

3125390825 is a deficient number, since it is larger than the sum of its proper divisors (750093829).

3125390825 is a wasteful number, since it uses less digits than its factorization.

3125390825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125015643 (or 125015638 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 3125390825 is about 55905.1949732760. The cubic root of 3125390825 is about 1462.0698147915.

The spelling of 3125390825 in words is "three billion, one hundred twenty-five million, three hundred ninety thousand, eight hundred twenty-five".