1290705925 has 12 divisors (see below), whose sum is σ = 1652104576. Its totient is φ = 999255600.

The previous prime is 1290705917. The next prime is 1290705961. The reversal of 1290705925 is 5295070921.

It is not a de Polignac number, because 1290705925 - 2³ = 1290705917 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 831939 + ... + 833488.

Almost surely, 2^1290705925 is an apocalyptic number.

It is an amenable number.

1290705925 is a deficient number, since it is larger than the sum of its proper divisors (361398651).

1290705925 is a wasteful number, since it uses less digits than its factorization.

1290705925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665468 (or 1665463 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 1290705925 is about 35926.3959366926. The cubic root of 1290705925 is about 1088.7857659622.

The spelling of 1290705925 in words is "one billion, two hundred ninety million, seven hundred five thousand, nine hundred twenty-five".