74705421 has 32 divisors (see below), whose sum is σ = 118483200. Its totient is φ = 40965120.

The previous prime is 74705417. The next prime is 74705441. The reversal of 74705421 is 12450747.

It is not a de Polignac number, because 74705421 - 2² = 74705417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74705441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146515 + ... + 147023.

It is an arithmetic number, because the mean of its divisors is an integer number (3702600).

Almost surely, 2^74705421 is an apocalyptic number.

It is an amenable number.

74705421 is a deficient number, since it is larger than the sum of its proper divisors (43777779).

74705421 is a wasteful number, since it uses less digits than its factorization.

74705421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 74705421 is about 8643.2297782715. The cubic root of 74705421 is about 421.1634803101.

The spelling of 74705421 in words is "seventy-four million, seven hundred five thousand, four hundred twenty-one".