856459 has 2 divisors, whose sum is σ = 856460. Its totient is φ = 856458.

The previous prime is 856441. The next prime is 856469. The reversal of 856459 is 954658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856459 - 2⁹ = 855947 is a prime.

It is not a weakly prime, because it can be changed into another prime (856469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428229 + 428230.

It is an arithmetic number, because the mean of its divisors is an integer number (428230).

2⁸⁵⁶⁴⁵⁹ is an apocalyptic number.

856459 is a deficient number, since it is larger than the sum of its proper divisors (1).

856459 is an equidigital number, since it uses as much as digits as its factorization.

856459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 37.

The square root of 856459 is about 925.4507010101. The cubic root of 856459 is about 94.9661559961.

The spelling of 856459 in words is "eight hundred fifty-six thousand, four hundred fifty-nine".