1131442142 has 4 divisors (see below), whose sum is σ = 1697163216. Its totient is φ = 565721070.

The previous prime is 1131442141. The next prime is 1131442177. The reversal of 1131442142 is 2412441311.

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

It is a super-2 number, since 2×1131442142² = 2560322641387096328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131442141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282860534 + ... + 282860537.

It is an arithmetic number, because the mean of its divisors is an integer number (424290804).

Almost surely, 2^1131442142 is an apocalyptic number.

1131442142 is a deficient number, since it is larger than the sum of its proper divisors (565721074).

1131442142 is an equidigital number, since it uses as much as digits as its factorization.

1131442142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565721073.

The product of its digits is 768, while the sum is 23.

The square root of 1131442142 is about 33636.9163568838. The cubic root of 1131442142 is about 1042.0233483200.

Adding to 1131442142 its reverse (2412441311), we get a palindrome (3543883453).

The spelling of 1131442142 in words is "one billion, one hundred thirty-one million, four hundred forty-two thousand, one hundred forty-two".