74618121 has 4 divisors (see below), whose sum is σ = 99490832. Its totient is φ = 49745412.

The previous prime is 74618113. The next prime is 74618153. The reversal of 74618121 is 12181647.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 74618121 - 2³ = 74618113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74610121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12436351 + ... + 12436356.

It is an arithmetic number, because the mean of its divisors is an integer number (24872708).

Almost surely, 2^74618121 is an apocalyptic number.

It is an amenable number.

74618121 is a deficient number, since it is larger than the sum of its proper divisors (24872711).

74618121 is a wasteful number, since it uses less digits than its factorization.

74618121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24872710.

The product of its digits is 2688, while the sum is 30.

The square root of 74618121 is about 8638.1781065222. The cubic root of 74618121 is about 420.9993605683. Note that the first 3 decimals are identical.

Adding to 74618121 its reverse (12181647), we get a palindrome (86799768).

The spelling of 74618121 in words is "seventy-four million, six hundred eighteen thousand, one hundred twenty-one".