78925251 has 8 divisors (see below), whose sum is σ = 105283584. Its totient is φ = 52591880.

The previous prime is 78925247. The next prime is 78925261. The reversal of 78925251 is 15252987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78925251 - 2² = 78925247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78925201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3166 + ... + 12956.

It is an arithmetic number, because the mean of its divisors is an integer number (13160448).

Almost surely, 2^78925251 is an apocalyptic number.

78925251 is a deficient number, since it is larger than the sum of its proper divisors (26358333).

78925251 is a wasteful number, since it uses less digits than its factorization.

78925251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12481.

The product of its digits is 50400, while the sum is 39.

The square root of 78925251 is about 8883.9884623968. The cubic root of 78925251 is about 428.9486683383.

The spelling of 78925251 in words is "seventy-eight million, nine hundred twenty-five thousand, two hundred fifty-one".