78512925 has 24 divisors (see below), whose sum is σ = 133999360. Its totient is φ = 40521600.

The previous prime is 78512911. The next prime is 78512933. The reversal of 78512925 is 52921587.

It is not a de Polignac number, because 78512925 - 2⁸ = 78512669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14560 + ... + 19209.

Almost surely, 2^78512925 is an apocalyptic number.

78512925 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78512925 is a deficient number, since it is larger than the sum of its proper divisors (55486435).

78512925 is a wasteful number, since it uses less digits than its factorization.

78512925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33813 (or 33808 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 78512925 is about 8860.7519432608. The cubic root of 78512925 is about 428.2003840120.

The spelling of 78512925 in words is "seventy-eight million, five hundred twelve thousand, nine hundred twenty-five".