75875021 has 4 divisors (see below), whose sum is σ = 77007552. Its totient is φ = 74742492.

The previous prime is 75874963. The next prime is 75875027. The reversal of 75875021 is 12057857.

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: 12057857 = 7 ⋅1722551.

It is a cyclic number.

It is not a de Polignac number, because 75875021 - 2¹⁰ = 75873997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75875027) 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, 566165 + ... + 566298.

It is an arithmetic number, because the mean of its divisors is an integer number (19251888).

Almost surely, 2^75875021 is an apocalyptic number.

It is an amenable number.

75875021 is a deficient number, since it is larger than the sum of its proper divisors (1132531).

75875021 is a wasteful number, since it uses less digits than its factorization.

75875021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132530.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 75875021 is about 8710.6269005164. The cubic root of 75875021 is about 423.3500428783.

The spelling of 75875021 in words is "seventy-five million, eight hundred seventy-five thousand, twenty-one".