856253 has 4 divisors (see below), whose sum is σ = 860928. Its totient is φ = 851580.

The previous prime is 856249. The next prime is 856277. The reversal of 856253 is 352658.

856253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 352658 = 2 ⋅176329.

It is a cyclic number.

It is not a de Polignac number, because 856253 - 2² = 856249 is a prime.

It is a super-3 number, since 3×856253³ = 1883334981045918831, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856213) 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, 2051 + ... + 2432.

It is an arithmetic number, because the mean of its divisors is an integer number (215232).

2⁸⁵⁶²⁵³ is an apocalyptic number.

It is an amenable number.

856253 is a deficient number, since it is larger than the sum of its proper divisors (4675).

856253 is a wasteful number, since it uses less digits than its factorization.

856253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674.

The product of its digits is 7200, while the sum is 29.

The square root of 856253 is about 925.3393971943. The cubic root of 856253 is about 94.9585414667.

The spelling of 856253 in words is "eight hundred fifty-six thousand, two hundred fifty-three".