77125251 has 16 divisors (see below), whose sum is σ = 119014400. Its totient is φ = 43512768.

The previous prime is 77125247. The next prime is 77125253. The reversal of 77125251 is 15252177.

It is not a de Polignac number, because 77125251 - 2² = 77125247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77125253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21586 + ... + 24903.

It is an arithmetic number, because the mean of its divisors is an integer number (7438400).

Almost surely, 2^77125251 is an apocalyptic number.

77125251 is a deficient number, since it is larger than the sum of its proper divisors (41889149).

77125251 is a wasteful number, since it uses less digits than its factorization.

77125251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46578.

The product of its digits is 4900, while the sum is 30.

The square root of 77125251 is about 8782.0983255712. The cubic root of 77125251 is about 425.6626359840.

The spelling of 77125251 in words is "seventy-seven million, one hundred twenty-five thousand, two hundred fifty-one".