75975121 has 4 divisors (see below), whose sum is σ = 76255744. Its totient is φ = 75694500.

The previous prime is 75975089. The next prime is 75975127. The reversal of 75975121 is 12157957.

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: 12157957 = 7 ⋅1736851.

It is a cyclic number.

It is not a de Polignac number, because 75975121 - 2⁵ = 75975089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75975127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139905 + ... + 140446.

It is an arithmetic number, because the mean of its divisors is an integer number (19063936).

Almost surely, 2^75975121 is an apocalyptic number.

It is an amenable number.

75975121 is a deficient number, since it is larger than the sum of its proper divisors (280623).

75975121 is a wasteful number, since it uses less digits than its factorization.

75975121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280622.

The product of its digits is 22050, while the sum is 37.

The square root of 75975121 is about 8716.3708617750. The cubic root of 75975121 is about 423.5361327429.

The spelling of 75975121 in words is "seventy-five million, nine hundred seventy-five thousand, one hundred twenty-one".