74306561 has 8 divisors (see below), whose sum is σ = 84975744. Its totient is φ = 63650880.

The previous prime is 74306543. The next prime is 74306563. The reversal of 74306561 is 16560347.

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 74306561 - 2¹⁰ = 74305537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74306563) 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 7 ways as a sum of consecutive naturals, for example, 15401 + ... + 19641.

It is an arithmetic number, because the mean of its divisors is an integer number (10621968).

Almost surely, 2^74306561 is an apocalyptic number.

It is an amenable number.

74306561 is a deficient number, since it is larger than the sum of its proper divisors (10669183).

74306561 is a wasteful number, since it uses less digits than its factorization.

74306561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6751.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 74306561 is about 8620.1253471165. The cubic root of 74306561 is about 420.4125971879.

The spelling of 74306561 in words is "seventy-four million, three hundred six thousand, five hundred sixty-one".