813142 has 16 divisors (see below), whose sum is σ = 1389312. Its totient is φ = 353320.

The previous prime is 813133. The next prime is 813157. The reversal of 813142 is 241318.

It is a super-2 number, since 2×813142² = 1322399824328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

813142 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 in 7 ways as a sum of consecutive naturals, for example, 298 + ... + 1309.

It is an arithmetic number, because the mean of its divisors is an integer number (86832).

2⁸¹³¹⁴² is an apocalyptic number.

813142 is a deficient number, since it is larger than the sum of its proper divisors (576170).

813142 is a wasteful number, since it uses less digits than its factorization.

813142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643.

The product of its digits is 192, while the sum is 19.

The square root of 813142 is about 901.7438660728. The cubic root of 813142 is about 93.3373496004.

It can be divided in two parts, 81 and 3142, that added together give a palindrome (3223).

The spelling of 813142 in words is "eight hundred thirteen thousand, one hundred forty-two".