1142331 has 4 divisors (see below), whose sum is σ = 1523112. Its totient is φ = 761552.

The previous prime is 1142321. The next prime is 1142333. The reversal of 1142331 is 1332411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142331 is a prime.

It is a super-2 number, since 2×1142331² = 2609840227122, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1142331.

It is not an unprimeable number, because it can be changed into a prime (1142333) 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, 190386 + ... + 190391.

It is an arithmetic number, because the mean of its divisors is an integer number (380778).

2^1142331 is an apocalyptic number.

1142331 is a deficient number, since it is larger than the sum of its proper divisors (380781).

1142331 is an equidigital number, since it uses as much as digits as its factorization.

1142331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380780.

The product of its digits is 72, while the sum is 15.

The square root of 1142331 is about 1068.7988585323. The cubic root of 1142331 is about 104.5355449392.

Subtracting from 1142331 its sum of digits (15), we obtain a triangular number (1142316 = T₁₅₁₁).

Adding to 1142331 its reverse (1332411), we get a palindrome (2474742).

The spelling of 1142331 in words is "one million, one hundred forty-two thousand, three hundred thirty-one".