857045 has 16 divisors (see below), whose sum is σ = 1202688. Its totient is φ = 574080.

The previous prime is 857039. The next prime is 857047. The reversal of 857045 is 540758.

It is not a de Polignac number, because 857045 - 2⁴ = 857029 is a prime.

It is a super-2 number, since 2×857045² = 1469052264050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 856999 and 857017.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 857045.

It is not an unprimeable number, because it can be changed into a prime (857047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1385 + ... + 1905.

It is an arithmetic number, because the mean of its divisors is an integer number (75168).

2⁸⁵⁷⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

857045 is a deficient number, since it is larger than the sum of its proper divisors (345643).

857045 is a wasteful number, since it uses less digits than its factorization.

857045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 857045 is about 925.7672493667. The cubic root of 857045 is about 94.9878100703.

The spelling of 857045 in words is "eight hundred fifty-seven thousand, forty-five".