1131231442 has 16 divisors (see below), whose sum is σ = 1959995232. Its totient is φ = 483949120.

The previous prime is 1131231421. The next prime is 1131231457. The reversal of 1131231442 is 2441321311.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1511968 + ... + 1512715.

It is an arithmetic number, because the mean of its divisors is an integer number (122499702).

Almost surely, 2^1131231442 is an apocalyptic number.

1131231442 is a deficient number, since it is larger than the sum of its proper divisors (828763790).

1131231442 is a wasteful number, since it uses less digits than its factorization.

1131231442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024713.

The product of its digits is 576, while the sum is 22.

The square root of 1131231442 is about 33633.7842354975. The cubic root of 1131231442 is about 1041.9586615686.

Adding to 1131231442 its reverse (2441321311), we get a palindrome (3572552753).

The spelling of 1131231442 in words is "one billion, one hundred thirty-one million, two hundred thirty-one thousand, four hundred forty-two".