857037175421 has 32 divisors (see below), whose sum is σ = 1084059782400. Its totient is φ = 660926407680.

The previous prime is 857037175417. The next prime is 857037175427. The reversal of 857037175421 is 124571730758.

It is not a de Polignac number, because 857037175421 - 2² = 857037175417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 857037175421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857037175427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1586060 + ... + 2056613.

It is an arithmetic number, because the mean of its divisors is an integer number (33876868200).

Almost surely, 2^857037175421 is an apocalyptic number.

It is an amenable number.

857037175421 is a deficient number, since it is larger than the sum of its proper divisors (227022606979).

857037175421 is a wasteful number, since it uses less digits than its factorization.

857037175421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642789.

The product of its (nonzero) digits is 1646400, while the sum is 50.

The spelling of 857037175421 in words is "eight hundred fifty-seven billion, thirty-seven million, one hundred seventy-five thousand, four hundred twenty-one".