76454721 has 24 divisors (see below), whose sum is σ = 127522304. Its totient is φ = 43234560.

The previous prime is 76454687. The next prime is 76454747. The reversal of 76454721 is 12745467.

76454721 is a `hidden beast` number, since 7 + 645 + 4 + 7 + 2 + 1 = 666.

It is not a de Polignac number, because 76454721 - 2¹⁰ = 76453697 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76454221) 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, 145 + ... + 12366.

Almost surely, 2^76454721 is an apocalyptic number.

It is an amenable number.

76454721 is a deficient number, since it is larger than the sum of its proper divisors (51067583).

76454721 is a wasteful number, since it uses less digits than its factorization.

76454721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12621 (or 12618 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 76454721 is about 8743.8390309978. The cubic root of 76454721 is about 424.4254677339.

The spelling of 76454721 in words is "seventy-six million, four hundred fifty-four thousand, seven hundred twenty-one".