1142311312 has 80 divisors (see below), whose sum is σ = 2456985600. Its totient is φ = 512300160.

The previous prime is 1142311283. The next prime is 1142311319. The reversal of 1142311312 is 2131132411.

It is a super-2 number, since 2×1142311312² = 2609750267046322688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1142311312.

It is not an unprimeable number, because it can be changed into a prime (1142311319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441639 + ... + 444217.

It is an arithmetic number, because the mean of its divisors is an integer number (30712320).

Almost surely, 2^1142311312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142311312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1228492800).

1142311312 is an abundant number, since it is smaller than the sum of its proper divisors (1314674288).

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

1142311312 is a wasteful number, since it uses less digits than its factorization.

1142311312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684 (or 2678 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 1142311312 is about 33798.0962777491. The cubic root of 1142311312 is about 1045.3494438129.

Adding to 1142311312 its reverse (2131132411), we get a palindrome (3273443723).

The spelling of 1142311312 in words is "one billion, one hundred forty-two million, three hundred eleven thousand, three hundred twelve".