74399121 has 16 divisors (see below), whose sum is σ = 112302720. Its totient is φ = 48662640.

The previous prime is 74399113. The next prime is 74399141. The reversal of 74399121 is 12199347.

It is not a de Polignac number, because 74399121 - 2³ = 74399113 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (74399141) 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, 24565 + ... + 27426.

It is an arithmetic number, because the mean of its divisors is an integer number (7018920).

Almost surely, 2^74399121 is an apocalyptic number.

It is an amenable number.

74399121 is a deficient number, since it is larger than the sum of its proper divisors (37903599).

74399121 is a wasteful number, since it uses less digits than its factorization.

74399121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52053 (or 52047 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 74399121 is about 8625.4925076775. The cubic root of 74399121 is about 420.5870871349.

The spelling of 74399121 in words is "seventy-four million, three hundred ninety-nine thousand, one hundred twenty-one".