857265 has 16 divisors (see below), whose sum is σ = 1393728. Its totient is φ = 449856.

The previous prime is 857249. The next prime is 857267. The reversal of 857265 is 562758.

It is a happy number.

It is not a de Polignac number, because 857265 - 2⁴ = 857249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579 + ... + 1431.

It is an arithmetic number, because the mean of its divisors is an integer number (87108).

2⁸⁵⁷²⁶⁵ is an apocalyptic number.

It is an amenable number.

857265 is a deficient number, since it is larger than the sum of its proper divisors (536463).

857265 is a wasteful number, since it uses less digits than its factorization.

857265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928.

The product of its digits is 16800, while the sum is 33.

The square root of 857265 is about 925.8860621048. The cubic root of 857265 is about 94.9959370377.

The spelling of 857265 in words is "eight hundred fifty-seven thousand, two hundred sixty-five".