857126172 has 24 divisors (see below), whose sum is σ = 2285670016. Its totient is φ = 244893168.

The previous prime is 857126147. The next prime is 857126173. The reversal of 857126172 is 271621758.

857126172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 857126172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857126173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5101858 + ... + 5102025.

Almost surely, 2^857126172 is an apocalyptic number.

It is an amenable number.

857126172 is an abundant number, since it is smaller than the sum of its proper divisors (1428543844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

857126172 is a wasteful number, since it uses less digits than its factorization.

857126172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203897 (or 10203895 counting only the distinct ones).

The product of its digits is 47040, while the sum is 39.

The square root of 857126172 is about 29276.7172340070. The cubic root of 857126172 is about 949.9080878761.

It can be divided in two parts, 8571 and 26172, that added together give a palindrome (34743).

The spelling of 857126172 in words is "eight hundred fifty-seven million, one hundred twenty-six thousand, one hundred seventy-two".