1142813 has 4 divisors (see below), whose sum is σ = 1306080. Its totient is φ = 979548.

The previous prime is 1142809. The next prime is 1142821. The reversal of 1142813 is 3182411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1142813 - 2² = 1142809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81623 + ... + 81636.

It is an arithmetic number, because the mean of its divisors is an integer number (326520).

2^1142813 is an apocalyptic number.

It is an amenable number.

1142813 is a deficient number, since it is larger than the sum of its proper divisors (163267).

1142813 is an equidigital number, since it uses as much as digits as its factorization.

1142813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163266.

The product of its digits is 192, while the sum is 20.

The square root of 1142813 is about 1069.0243215194. The cubic root of 1142813 is about 104.5502455959.

It can be divided in two parts, 11 and 42813, that added together give a palindrome (42824).

The spelling of 1142813 in words is "one million, one hundred forty-two thousand, eight hundred thirteen".