78725075 has 72 divisors (see below), whose sum is σ = 123023376. Its totient is φ = 49248000.

The previous prime is 78725071. The next prime is 78725083. The reversal of 78725075 is 57052787.

It is not a de Polignac number, because 78725075 - 2² = 78725071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78725071) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1290545 + ... + 1290605.

It is an arithmetic number, because the mean of its divisors is an integer number (1708658).

Almost surely, 2^78725075 is an apocalyptic number.

78725075 is a deficient number, since it is larger than the sum of its proper divisors (44298301).

78725075 is a wasteful number, since it uses less digits than its factorization.

78725075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 41.

The square root of 78725075 is about 8872.7151988554. The cubic root of 78725075 is about 428.5857176453.

The spelling of 78725075 in words is "seventy-eight million, seven hundred twenty-five thousand, seventy-five".