74187121 has 8 divisors (see below), whose sum is σ = 78874560. Its totient is φ = 69621552.

The previous prime is 74187097. The next prime is 74187137. The reversal of 74187121 is 12178147.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74187121 - 2¹⁹ = 73662833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74187161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29211 + ... + 31648.

It is an arithmetic number, because the mean of its divisors is an integer number (9859320).

Almost surely, 2^74187121 is an apocalyptic number.

It is an amenable number.

74187121 is a deficient number, since it is larger than the sum of its proper divisors (4687439).

74187121 is a wasteful number, since it uses less digits than its factorization.

74187121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60935.

The product of its digits is 3136, while the sum is 31.

The square root of 74187121 is about 8613.1945873758. The cubic root of 74187121 is about 420.1872200090.

The spelling of 74187121 in words is "seventy-four million, one hundred eighty-seven thousand, one hundred twenty-one".