78025025 has 24 divisors (see below), whose sum is σ = 105269304. Its totient is φ = 57024000.

The previous prime is 78024997. The next prime is 78025033. The reversal of 78025025 is 52052087.

It can be written as a sum of positive squares in 12 ways, for example, as 17247409 + 60777616 = 4153^2 + 7796^2 .

It is not a de Polignac number, because 78025025 - 2²² = 73830721 is a prime.

It is a Duffinian 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, 31637 + ... + 34013.

It is an arithmetic number, because the mean of its divisors is an integer number (4386221).

Almost surely, 2^78025025 is an apocalyptic number.

It is an amenable number.

78025025 is a deficient number, since it is larger than the sum of its proper divisors (27244279).

78025025 is a wasteful number, since it uses less digits than its factorization.

78025025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501 (or 2496 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 78025025 is about 8833.1775143490. The cubic root of 78025025 is about 427.3115569949.

The spelling of 78025025 in words is "seventy-eight million, twenty-five thousand, twenty-five".