857144 has 16 divisors (see below), whose sum is σ = 1617000. Its totient is φ = 425952.

The previous prime is 857137. The next prime is 857161. The reversal of 857144 is 441758.

It is a congruent number.

It is an unprimeable number.

857144 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2282 + ... + 2630.

2⁸⁵⁷¹⁴⁴ is an apocalyptic number.

It is an amenable number.

857144 is a deficient number, since it is larger than the sum of its proper divisors (759856).

857144 is a wasteful number, since it uses less digits than its factorization.

857144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 658 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 857144 is about 925.8207169857. The cubic root of 857144 is about 94.9914673777.

It can be divided in two parts, 857 and 144, that added together give a palindrome (1001).

The spelling of 857144 in words is "eight hundred fifty-seven thousand, one hundred forty-four".