75121424 has 20 divisors (see below), whose sum is σ = 166340544. Its totient is φ = 32194848.

The previous prime is 75121411. The next prime is 75121441. The reversal of 75121424 is 42412157.

It is a junction number, because it is equal to n+sod(n) for n = 75121393 and 75121402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335252 + ... + 335475.

Almost surely, 2^75121424 is an apocalyptic number.

It is an amenable number.

75121424 is an abundant number, since it is smaller than the sum of its proper divisors (91219120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75121424 is a wasteful number, since it uses less digits than its factorization.

75121424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670742 (or 670736 counting only the distinct ones).

The product of its digits is 2240, while the sum is 26.

The square root of 75121424 is about 8667.2616206043. The cubic root of 75121424 is about 421.9437943158.

The spelling of 75121424 in words is "seventy-five million, one hundred twenty-one thousand, four hundred twenty-four".