1142231 has 4 divisors (see below), whose sum is σ = 1157952. Its totient is φ = 1126512.

The previous prime is 1142201. The next prime is 1142233. The reversal of 1142231 is 1322411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1322411 = 157 ⋅8423.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142231 is a prime.

It is a super-2 number, since 2×1142231² = 2609383314722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7751 + ... + 7896.

It is an arithmetic number, because the mean of its divisors is an integer number (289488).

2^1142231 is an apocalyptic number.

1142231 is a deficient number, since it is larger than the sum of its proper divisors (15721).

1142231 is an equidigital number, since it uses as much as digits as its factorization.

1142231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15720.

The product of its digits is 48, while the sum is 14.

The square root of 1142231 is about 1068.7520760214. The cubic root of 1142231 is about 104.5324944925.

Adding to 1142231 its reverse (1322411), we get a palindrome (2464642).

The spelling of 1142231 in words is "one million, one hundred forty-two thousand, two hundred thirty-one".