1142311520 has 72 divisors (see below), whose sum is σ = 3139338384. Its totient is φ = 391646976.

The previous prime is 1142311507. The next prime is 1142311531. The reversal of 1142311520 is 251132411.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1142311492 and 1142311501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65012 + ... + 80691.

It is an arithmetic number, because the mean of its divisors is an integer number (43601922).

Almost surely, 2^1142311520 is an apocalyptic number.

1142311520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142311520 is an abundant number, since it is smaller than the sum of its proper divisors (1997026864).

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

1142311520 is a wasteful number, since it uses less digits than its factorization.

1142311520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145732 (or 145717 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1142311520 is about 33798.0993548454. The cubic root of 1142311520 is about 1045.3495072611.

Adding to 1142311520 its reverse (251132411), we get a palindrome (1393443931).

The spelling of 1142311520 in words is "one billion, one hundred forty-two million, three hundred eleven thousand, five hundred twenty".