78625425 has 24 divisors (see below), whose sum is σ = 137642976. Its totient is φ = 39466240.

The previous prime is 78625423. The next prime is 78625427. The reversal of 78625425 is 52452687.

It is an interprime number because it is at equal distance from previous prime (78625423) and next prime (78625427).

It is not a de Polignac number, because 78625425 - 2¹ = 78625423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78625423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29559 + ... + 32108.

It is an arithmetic number, because the mean of its divisors is an integer number (5735124).

Almost surely, 2^78625425 is an apocalyptic number.

78625425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78625425 is a deficient number, since it is larger than the sum of its proper divisors (59017551).

78625425 is a wasteful number, since it uses less digits than its factorization.

78625425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61697 (or 61692 counting only the distinct ones).

The product of its digits is 134400, while the sum is 39.

The square root of 78625425 is about 8867.0978905164. The cubic root of 78625425 is about 428.4048070541.

The spelling of 78625425 in words is "seventy-eight million, six hundred twenty-five thousand, four hundred twenty-five".