78620125 has 16 divisors (see below), whose sum is σ = 100406592. Its totient is φ = 61429200.

The previous prime is 78620111. The next prime is 78620159. The reversal of 78620125 is 52102687.

It is not a de Polignac number, because 78620125 - 2⁷ = 78619997 is a prime.

It is a super-2 number, since 2×78620125² = 12362248110031250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1939 + ... + 12688.

It is an arithmetic number, because the mean of its divisors is an integer number (6275412).

Almost surely, 2^78620125 is an apocalyptic number.

It is an amenable number.

78620125 is a deficient number, since it is larger than the sum of its proper divisors (21786467).

78620125 is a wasteful number, since it uses less digits than its factorization.

78620125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14685 (or 14675 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 78620125 is about 8866.7990278341. The cubic root of 78620125 is about 428.3951808359.

The spelling of 78620125 in words is "seventy-eight million, six hundred twenty thousand, one hundred twenty-five".