78922125 has 72 divisors (see below), whose sum is σ = 149021496. Its totient is φ = 40176000.

The previous prime is 78922111. The next prime is 78922163. The reversal of 78922125 is 52122987.

It can be written as a sum of positive squares in 4 ways, for example, as 2499561 + 76422564 = 1581^2 + 8742^2 .

It is not a de Polignac number, because 78922125 - 2⁶ = 78922061 is a prime.

Its product of digits (20160) is a multiple of the sum of its prime divisors (112).

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 78922125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1081089 + ... + 1081161.

It is an arithmetic number, because the mean of its divisors is an integer number (2069743).

Almost surely, 2^78922125 is an apocalyptic number.

78922125 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78922125 is a deficient number, since it is larger than the sum of its proper divisors (70099371).

78922125 is a wasteful number, since it uses less digits than its factorization.

78922125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 112 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 78922125 is about 8883.8125261624. The cubic root of 78922125 is about 428.9430051265.

The spelling of 78922125 in words is "seventy-eight million, nine hundred twenty-two thousand, one hundred twenty-five".