856453 has 4 divisors (see below), whose sum is σ = 922348. Its totient is φ = 790560.

The previous prime is 856441. The next prime is 856459. The reversal of 856453 is 354658.

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

It can be written as a sum of positive squares in 2 ways, for example, as 289444 + 567009 = 538^2 + 753^2 .

It is a cyclic number.

It is not a de Polignac number, because 856453 - 2⁵ = 856421 is a prime.

It is a Duffinian number.

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 856453.

It is not an unprimeable number, because it can be changed into a prime (856459) 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, 32928 + ... + 32953.

It is an arithmetic number, because the mean of its divisors is an integer number (230587).

2⁸⁵⁶⁴⁵³ is an apocalyptic number.

It is an amenable number.

856453 is a deficient number, since it is larger than the sum of its proper divisors (65895).

856453 is a wasteful number, since it uses less digits than its factorization.

856453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65894.

The product of its digits is 14400, while the sum is 31.

The square root of 856453 is about 925.4474593406. The cubic root of 856453 is about 94.9659342310.

The spelling of 856453 in words is "eight hundred fifty-six thousand, four hundred fifty-three".