875125831421 has 2 divisors, whose sum is σ = 875125831422. Its totient is φ = 875125831420.

The previous prime is 875125831381. The next prime is 875125831501. The reversal of 875125831421 is 124138521578.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 677913456025 + 197212375396 = 823355^2 + 444086^2 .

It is a cyclic number.

It is not a de Polignac number, because 875125831421 - 2²⁶ = 875058722557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (875125830421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437562915710 + 437562915711.

It is an arithmetic number, because the mean of its divisors is an integer number (437562915711).

Almost surely, 2^875125831421 is an apocalyptic number.

It is an amenable number.

875125831421 is a deficient number, since it is larger than the sum of its proper divisors (1).

875125831421 is an equidigital number, since it uses as much as digits as its factorization.

875125831421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 537600, while the sum is 47.

The spelling of 875125831421 in words is "eight hundred seventy-five billion, one hundred twenty-five million, eight hundred thirty-one thousand, four hundred twenty-one".