1131297570 has 256 divisors, whose sum is σ = 3456552960. Its totient is φ = 261273600.

The previous prime is 1131297499. The next prime is 1131297581. The reversal of 1131297570 is 757921311.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4025830 + ... + 4026110.

It is an arithmetic number, because the mean of its divisors is an integer number (13502160).

Almost surely, 2^1131297570 is an apocalyptic number.

1131297570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131297570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1728276480).

1131297570 is an abundant number, since it is smaller than the sum of its proper divisors (2325255390).

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

1131297570 is a wasteful number, since it uses less digits than its factorization.

1131297570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The square root of 1131297570 is about 33634.7672803009. The cubic root of 1131297570 is about 1041.9789643105.

The spelling of 1131297570 in words is "one billion, one hundred thirty-one million, two hundred ninety-seven thousand, five hundred seventy".