1131320624 has 120 divisors (see below), whose sum is σ = 2793839040. Its totient is φ = 440444928.

The previous prime is 1131320623. The next prime is 1131320681. The reversal of 1131320624 is 4260231311.

It is a self number, because there is not a number n which added to its sum of digits gives 1131320624.

It is not an unprimeable number, because it can be changed into a prime (1131320623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385049 + ... + 387975.

It is an arithmetic number, because the mean of its divisors is an integer number (23281992).

Almost surely, 2^1131320624 is an apocalyptic number.

1131320624 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131320624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1396919520).

1131320624 is an abundant number, since it is smaller than the sum of its proper divisors (1662518416).

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

1131320624 is a wasteful number, since it uses less digits than its factorization.

1131320624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2995 (or 2982 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1131320624 is about 33635.1099894143. The cubic root of 1131320624 is about 1041.9860422065.

Adding to 1131320624 its reverse (4260231311), we get a palindrome (5391551935).

The spelling of 1131320624 in words is "one billion, one hundred thirty-one million, three hundred twenty thousand, six hundred twenty-four".