857655122 has 4 divisors (see below), whose sum is σ = 1286482686. Its totient is φ = 428827560.

The previous prime is 857655103. The next prime is 857655163. The reversal of 857655122 is 221556758.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 452880961 + 404774161 = 21281^2 + 20119^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 857655122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214413779 + ... + 214413782.

Almost surely, 2^857655122 is an apocalyptic number.

857655122 is a deficient number, since it is larger than the sum of its proper divisors (428827564).

857655122 is a wasteful number, since it uses less digits than its factorization.

857655122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428827563.

The product of its digits is 168000, while the sum is 41.

The square root of 857655122 is about 29285.7494696653. The cubic root of 857655122 is about 950.1034502302.

The spelling of 857655122 in words is "eight hundred fifty-seven million, six hundred fifty-five thousand, one hundred twenty-two".