1131312042 has 64 divisors (see below), whose sum is σ = 2880403200. Its totient is φ = 322418880.

The previous prime is 1131312031. The next prime is 1131312059. The reversal of 1131312042 is 2402131311.

It is a super-3 number, since 3×1131312042³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 155584 + ... + 162692.

It is an arithmetic number, because the mean of its divisors is an integer number (45006300).

Almost surely, 2^1131312042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131312042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440201600).

1131312042 is an abundant number, since it is smaller than the sum of its proper divisors (1749091158).

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

1131312042 is a wasteful number, since it uses less digits than its factorization.

1131312042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7548 (or 7542 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1131312042 is about 33634.9824141473. The cubic root of 1131312042 is about 1041.9834074254.

Adding to 1131312042 its reverse (2402131311), we get a palindrome (3533443353).

The spelling of 1131312042 in words is "one billion, one hundred thirty-one million, three hundred twelve thousand, forty-two".