74864721 has 8 divisors (see below), whose sum is σ = 103039744. Its totient is φ = 48299760.

The previous prime is 74864711. The next prime is 74864761. The reversal of 74864721 is 12746847.

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

It is not a de Polignac number, because 74864721 - 2¹⁰ = 74863697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74864721.

It is not an unprimeable number, because it can be changed into a prime (74864711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402406 + ... + 402591.

It is an arithmetic number, because the mean of its divisors is an integer number (12879968).

Almost surely, 2^74864721 is an apocalyptic number.

It is an amenable number.

74864721 is a deficient number, since it is larger than the sum of its proper divisors (28175023).

74864721 is a wasteful number, since it uses less digits than its factorization.

74864721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805031.

The product of its digits is 75264, while the sum is 39.

The square root of 74864721 is about 8652.4401760428. The cubic root of 74864721 is about 421.4626273240.

The spelling of 74864721 in words is "seventy-four million, eight hundred sixty-four thousand, seven hundred twenty-one".