75612921 has 8 divisors (see below), whose sum is σ = 101048640. Its totient is φ = 50292912.

The previous prime is 75612907. The next prime is 75613003. The reversal of 75612921 is 12921657.

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

It is not a de Polignac number, because 75612921 - 2⁹ = 75612409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75612421) 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, 27390 + ... + 30023.

It is an arithmetic number, because the mean of its divisors is an integer number (12631080).

Almost surely, 2^75612921 is an apocalyptic number.

It is an amenable number.

75612921 is a deficient number, since it is larger than the sum of its proper divisors (25435719).

75612921 is a wasteful number, since it uses less digits than its factorization.

75612921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57855.

The product of its digits is 7560, while the sum is 33.

The square root of 75612921 is about 8695.5690440592. The cubic root of 75612921 is about 422.8620120085.

The spelling of 75612921 in words is "seventy-five million, six hundred twelve thousand, nine hundred twenty-one".