7965875421 has 80 divisors (see below), whose sum is σ = 13870696576. Its totient is φ = 4461899904.

The previous prime is 7965875387. The next prime is 7965875471. The reversal of 7965875421 is 1245785697.

7965875421 is a `hidden beast` number, since 7 + 9 + 6 + 587 + 54 + 2 + 1 = 666.

It is not a de Polignac number, because 7965875421 - 2⁷ = 7965875293 is a prime.

It is a Duffinian number.

Its product of digits (4233600) is a multiple of the sum of its prime factors (1120).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7965875471) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 10522575 + ... + 10523331.

Almost surely, 2^7965875421 is an apocalyptic number.

It is an amenable number.

7965875421 is a deficient number, since it is larger than the sum of its proper divisors (5904821155).

7965875421 is a wasteful number, since it uses less digits than its factorization.

7965875421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120 (or 1111 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The square root of 7965875421 is about 89251.7530416070. The cubic root of 7965875421 is about 1997.1522321169.

The spelling of 7965875421 in words is "seven billion, nine hundred sixty-five million, eight hundred seventy-five thousand, four hundred twenty-one".