857800125 has 320 divisors, whose sum is σ = 2114112000. Its totient is φ = 342921600.

The previous prime is 857800109. The next prime is 857800133. The reversal of 857800125 is 521008758.

It is not a de Polignac number, because 857800125 - 2⁴ = 857800109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 857800125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 45147366 + ... + 45147384.

It is an arithmetic number, because the mean of its divisors is an integer number (6606600).

Almost surely, 2^857800125 is an apocalyptic number.

It is an amenable number.

857800125 is an abundant number, since it is smaller than the sum of its proper divisors (1256311875).

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

857800125 is a wasteful number, since it uses less digits than its factorization.

857800125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 857800125 is about 29288.2250230361. The cubic root of 857800125 is about 950.1569915989.

The spelling of 857800125 in words is "eight hundred fifty-seven million, eight hundred thousand, one hundred twenty-five".