74507621 has 4 divisors (see below), whose sum is σ = 74559744. Its totient is φ = 74455500.

The previous prime is 74507611. The next prime is 74507623. The reversal of 74507621 is 12670547.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74507621 - 2²² = 70313317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74507623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23855 + ... + 26796.

It is an arithmetic number, because the mean of its divisors is an integer number (18639936).

Almost surely, 2^74507621 is an apocalyptic number.

It is an amenable number.

74507621 is a deficient number, since it is larger than the sum of its proper divisors (52123).

74507621 is a wasteful number, since it uses less digits than its factorization.

74507621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52122.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 74507621 is about 8631.7797122030. The cubic root of 74507621 is about 420.7914422984.

The spelling of 74507621 in words is "seventy-four million, five hundred seven thousand, six hundred twenty-one".