74940121 has 4 divisors (see below), whose sum is σ = 75966772. Its totient is φ = 73913472.

The previous prime is 74940109. The next prime is 74940127. The reversal of 74940121 is 12104947.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47114496 + 27825625 = 6864^2 + 5275^2 .

It is a cyclic number.

It is not a de Polignac number, because 74940121 - 2⁷ = 74939993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74940121.

It is not an unprimeable number, because it can be changed into a prime (74940127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513216 + ... + 513361.

It is an arithmetic number, because the mean of its divisors is an integer number (18991693).

Almost surely, 2^74940121 is an apocalyptic number.

It is an amenable number.

74940121 is a deficient number, since it is larger than the sum of its proper divisors (1026651).

74940121 is a wasteful number, since it uses less digits than its factorization.

74940121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026650.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 74940121 is about 8656.7962318631. The cubic root of 74940121 is about 421.6040718707.

The spelling of 74940121 in words is "seventy-four million, nine hundred forty thousand, one hundred twenty-one".