831442 has 4 divisors (see below), whose sum is σ = 1247166. Its totient is φ = 415720.

The previous prime is 831437. The next prime is 831443. The reversal of 831442 is 244138.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244138 = 2 ⋅122069.

It can be written as a sum of positive squares in only one way, i.e., 829921 + 1521 = 911^2 + 39^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (831443) by changing a digit.

831442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207859 + ... + 207862.

2⁸³¹⁴⁴² is an apocalyptic number.

831442 is a deficient number, since it is larger than the sum of its proper divisors (415724).

831442 is a wasteful number, since it uses less digits than its factorization.

831442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415723.

The product of its digits is 768, while the sum is 22.

The square root of 831442 is about 911.8344147925. The cubic root of 831442 is about 94.0323564482.

The spelling of 831442 in words is "eight hundred thirty-one thousand, four hundred forty-two".