831345 has 16 divisors (see below), whose sum is σ = 1400640. Its totient is φ = 419904.

The previous prime is 831329. The next prime is 831361. The reversal of 831345 is 543138.

It is an interprime number because it is at equal distance from previous prime (831329) and next prime (831361).

It is not a de Polignac number, because 831345 - 2⁴ = 831329 is a prime.

It is a super-2 number, since 2×831345² = 1382269018050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1174 + ... + 1743.

It is an arithmetic number, because the mean of its divisors is an integer number (87540).

2⁸³¹³⁴⁵ is an apocalyptic number.

It is an amenable number.

831345 is a deficient number, since it is larger than the sum of its proper divisors (569295).

831345 is a wasteful number, since it uses less digits than its factorization.

831345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2944.

The product of its digits is 1440, while the sum is 24.

The square root of 831345 is about 911.7812237593. The cubic root of 831345 is about 94.0286995512.

It can be divided in two parts, 831 and 345, that added together give a triangular number (1176 = T₄₈).

The spelling of 831345 in words is "eight hundred thirty-one thousand, three hundred forty-five".