13231142 has 4 divisors (see below), whose sum is σ = 19846716. Its totient is φ = 6615570.

The previous prime is 13231123. The next prime is 13231147. The reversal of 13231142 is 24113231.

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

It is a self number, because there is not a number n which added to its sum of digits gives 13231142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3307784 + ... + 3307787.

It is an arithmetic number, because the mean of its divisors is an integer number (4961679).

Almost surely, 2^13231142 is an apocalyptic number.

13231142 is a deficient number, since it is larger than the sum of its proper divisors (6615574).

13231142 is an equidigital number, since it uses as much as digits as its factorization.

13231142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6615573.

The product of its digits is 144, while the sum is 17.

The square root of 13231142 is about 3637.4636767946. The cubic root of 13231142 is about 236.5188598565.

Adding to 13231142 its reverse (24113231), we get a palindrome (37344373).

The spelling of 13231142 in words is "thirteen million, two hundred thirty-one thousand, one hundred forty-two".