1131806242 has 16 divisors (see below), whose sum is σ = 1942903872. Its totient is φ = 484393680.

The previous prime is 1131806237. The next prime is 1131806257. The reversal of 1131806242 is 2426081311.

It is a self number, because there is not a number n which added to its sum of digits gives 1131806242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44884 + ... + 65407.

It is an arithmetic number, because the mean of its divisors is an integer number (121431492).

Almost surely, 2^1131806242 is an apocalyptic number.

1131806242 is a deficient number, since it is larger than the sum of its proper divisors (811097630).

1131806242 is a wasteful number, since it uses less digits than its factorization.

1131806242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111033.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1131806242 is about 33642.3281299021. The cubic root of 1131806242 is about 1042.1351112925.

Adding to 1131806242 its reverse (2426081311), we get a palindrome (3557887553).

The spelling of 1131806242 in words is "one billion, one hundred thirty-one million, eight hundred six thousand, two hundred forty-two".