831145 has 8 divisors (see below), whose sum is σ = 1139904. Its totient is φ = 569904.

The previous prime is 831139. The next prime is 831161. The reversal of 831145 is 541138.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 831145 - 2¹¹ = 829097 is a prime.

It is a super-2 number, since 2×831145² = 1381604022050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11839 + ... + 11908.

It is an arithmetic number, because the mean of its divisors is an integer number (142488).

2⁸³¹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

831145 is a deficient number, since it is larger than the sum of its proper divisors (308759).

831145 is a wasteful number, since it uses less digits than its factorization.

831145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23759.

The product of its digits is 480, while the sum is 22.

The square root of 831145 is about 911.6715417298. The cubic root of 831145 is about 94.0211586594.

The spelling of 831145 in words is "eight hundred thirty-one thousand, one hundred forty-five".