76621251 has 24 divisors (see below), whose sum is σ = 121749264. Its totient is φ = 42712320.

The previous prime is 76621241. The next prime is 76621253. The reversal of 76621251 is 15212667.

It is not a de Polignac number, because 76621251 - 2⁶ = 76621187 is a prime.

It is a super-2 number, since 2×76621251² = 11741632209610002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (76621253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330 + ... + 12383.

It is an arithmetic number, because the mean of its divisors is an integer number (5072886).

Almost surely, 2^76621251 is an apocalyptic number.

76621251 is a deficient number, since it is larger than the sum of its proper divisors (45128013).

76621251 is a wasteful number, since it uses less digits than its factorization.

76621251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12771 (or 12764 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 76621251 is about 8753.3565562017. The cubic root of 76621251 is about 424.7333986560.

The spelling of 76621251 in words is "seventy-six million, six hundred twenty-one thousand, two hundred fifty-one".