78702425 has 6 divisors (see below), whose sum is σ = 97591038. Its totient is φ = 62961920.

The previous prime is 78702419. The next prime is 78702443. The reversal of 78702425 is 52420787.

It can be written as a sum of positive squares in 3 ways, for example, as 43264 + 78659161 = 208^2 + 8869^2 .

It is not a de Polignac number, because 78702425 - 2¹⁶ = 78636889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1574024 + ... + 1574073.

It is an arithmetic number, because the mean of its divisors is an integer number (16265173).

Almost surely, 2^78702425 is an apocalyptic number.

It is an amenable number.

78702425 is a deficient number, since it is larger than the sum of its proper divisors (18888613).

78702425 is a wasteful number, since it uses less digits than its factorization.

78702425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148107 (or 3148102 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 78702425 is about 8871.4387221014. The cubic root of 78702425 is about 428.5446108881.

The spelling of 78702425 in words is "seventy-eight million, seven hundred two thousand, four hundred twenty-five".