1131144042 has 64 divisors (see below), whose sum is σ = 2623832064. Its totient is φ = 318427200.

The previous prime is 1131144037. The next prime is 1131144067. The reversal of 1131144042 is 2404411311.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 31 ways as a sum of consecutive naturals, for example, 868792 + ... + 870092.

It is an arithmetic number, because the mean of its divisors is an integer number (40997376).

Almost surely, 2^1131144042 is an apocalyptic number.

1131144042 is an abundant number, since it is smaller than the sum of its proper divisors (1492688022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131144042 is a wasteful number, since it uses less digits than its factorization.

1131144042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1131144042 is about 33632.4849215754. The cubic root of 1131144042 is about 1041.9318266437.

Adding to 1131144042 its reverse (2404411311), we get a palindrome (3535555353).

The spelling of 1131144042 in words is "one billion, one hundred thirty-one million, one hundred forty-four thousand, forty-two".