1131240442 has 8 divisors (see below), whose sum is σ = 1742721876. Its totient is φ = 550333152.

The previous prime is 1131240403. The next prime is 1131240443. The reversal of 1131240442 is 2440421311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1104831121 + 26409321 = 33239^2 + 5139^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1131240443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7643443 + ... + 7643590.

Almost surely, 2^1131240442 is an apocalyptic number.

1131240442 is a deficient number, since it is larger than the sum of its proper divisors (611481434).

1131240442 is a wasteful number, since it uses less digits than its factorization.

1131240442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15287072.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1131240442 is about 33633.9180292752. The cubic root of 1131240442 is about 1041.9614248119.

Adding to 1131240442 its reverse (2440421311), we get a palindrome (3571661753).

The spelling of 1131240442 in words is "one billion, one hundred thirty-one million, two hundred forty thousand, four hundred forty-two".