74268921 has 4 divisors (see below), whose sum is σ = 99025232. Its totient is φ = 49512612.

The previous prime is 74268919. The next prime is 74268941. The reversal of 74268921 is 12986247.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12986247 = 3 ⋅4328749.

It is not a de Polignac number, because 74268921 - 2¹ = 74268919 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74268921.

It is not an unprimeable number, because it can be changed into a prime (74268941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12378151 + ... + 12378156.

It is an arithmetic number, because the mean of its divisors is an integer number (24756308).

Almost surely, 2^74268921 is an apocalyptic number.

It is an amenable number.

74268921 is a deficient number, since it is larger than the sum of its proper divisors (24756311).

74268921 is a wasteful number, since it uses less digits than its factorization.

74268921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24756310.

The product of its digits is 48384, while the sum is 39.

The square root of 74268921 is about 8617.9418076476. The cubic root of 74268921 is about 420.3415985097.

The spelling of 74268921 in words is "seventy-four million, two hundred sixty-eight thousand, nine hundred twenty-one".