74312121 has 16 divisors (see below), whose sum is σ = 107097536. Its totient is φ = 45562176.

The previous prime is 74312107. The next prime is 74312129. The reversal of 74312121 is 12121347.

It is not a de Polignac number, because 74312121 - 2⁵ = 74312089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74312129) 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, 7671 + ... + 14403.

It is an arithmetic number, because the mean of its divisors is an integer number (6693596).

Almost surely, 2^74312121 is an apocalyptic number.

It is an amenable number.

74312121 is a deficient number, since it is larger than the sum of its proper divisors (32785415).

74312121 is a wasteful number, since it uses less digits than its factorization.

74312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7032.

The product of its digits is 336, while the sum is 21.

The square root of 74312121 is about 8620.4478421947. The cubic root of 74312121 is about 420.4230827391.

Adding to 74312121 its reverse (12121347), we get a palindrome (86433468).

The spelling of 74312121 in words is "seventy-four million, three hundred twelve thousand, one hundred twenty-one".