857051 has 4 divisors (see below), whose sum is σ = 922992. Its totient is φ = 791112.

The previous prime is 857047. The next prime is 857053. The reversal of 857051 is 150758.

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

It is a cyclic number.

It is not a de Polignac number, because 857051 - 2² = 857047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 857051.

It is not an unprimeable number, because it can be changed into a prime (857053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32951 + ... + 32976.

It is an arithmetic number, because the mean of its divisors is an integer number (230748).

2⁸⁵⁷⁰⁵¹ is an apocalyptic number.

857051 is a deficient number, since it is larger than the sum of its proper divisors (65941).

857051 is a wasteful number, since it uses less digits than its factorization.

857051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65940.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 857051 is about 925.7704899164. The cubic root of 857051 is about 94.9880317333.

The spelling of 857051 in words is "eight hundred fifty-seven thousand, fifty-one".