859431 has 4 divisors (see below), whose sum is σ = 1145912. Its totient is φ = 572952.

The previous prime is 859423. The next prime is 859433. The reversal of 859431 is 134958.

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

It is not a de Polignac number, because 859431 - 2³ = 859423 is a prime.

It is a super-2 number, since 2×859431² = 1477243287522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859433) 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 3 ways as a sum of consecutive naturals, for example, 143236 + ... + 143241.

It is an arithmetic number, because the mean of its divisors is an integer number (286478).

2⁸⁵⁹⁴³¹ is an apocalyptic number.

859431 is a deficient number, since it is larger than the sum of its proper divisors (286481).

859431 is a wasteful number, since it uses less digits than its factorization.

859431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286480.

The product of its digits is 4320, while the sum is 30.

The square root of 859431 is about 927.0550145488. The cubic root of 859431 is about 95.0758765926.

The spelling of 859431 in words is "eight hundred fifty-nine thousand, four hundred thirty-one".