74281921 has 16 divisors (see below), whose sum is σ = 88560640. Its totient is φ = 60963840.

The previous prime is 74281897. The next prime is 74281931. The reversal of 74281921 is 12918247.

It is not a de Polignac number, because 74281921 - 2¹⁹ = 73757633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74281931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19285 + ... + 22813.

It is an arithmetic number, because the mean of its divisors is an integer number (5535040).

Almost surely, 2^74281921 is an apocalyptic number.

It is an amenable number.

74281921 is a deficient number, since it is larger than the sum of its proper divisors (14278719).

74281921 is a wasteful number, since it uses less digits than its factorization.

74281921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664.

The product of its digits is 8064, while the sum is 34.

The square root of 74281921 is about 8618.6960150594. The cubic root of 74281921 is about 420.3661225497.

The spelling of 74281921 in words is "seventy-four million, two hundred eighty-one thousand, nine hundred twenty-one".