1312517925 has 60 divisors (see below), whose sum is σ = 2449252960. Its totient is φ = 694824480.

The previous prime is 1312517867. The next prime is 1312517933. The reversal of 1312517925 is 5297152131.

1312517925 is a `hidden beast` number, since 131 + 2 + 517 + 9 + 2 + 5 = 666.

It is not a de Polignac number, because 1312517925 - 2⁷ = 1312517797 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312517925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 279144 + ... + 283806.

Almost surely, 2^1312517925 is an apocalyptic number.

1312517925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312517925 is a deficient number, since it is larger than the sum of its proper divisors (1136735035).

1312517925 is a wasteful number, since it uses less digits than its factorization.

1312517925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4824 (or 4810 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 1312517925 is about 36228.6892531320. The cubic root of 1312517925 is about 1094.8847692592.

The spelling of 1312517925 in words is "one billion, three hundred twelve million, five hundred seventeen thousand, nine hundred twenty-five".