1131230540 has 48 divisors (see below), whose sum is σ = 2598946560. Its totient is φ = 410182080.

The previous prime is 1131230537. The next prime is 1131230561. The reversal of 1131230540 is 450321311.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71819 + ... + 86141.

It is an arithmetic number, because the mean of its divisors is an integer number (54144720).

Almost surely, 2^1131230540 is an apocalyptic number.

1131230540 is a gapful number since it is divisible by the number (10) 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 1131230540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1299473280).

1131230540 is an abundant number, since it is smaller than the sum of its proper divisors (1467716020).

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

1131230540 is a wasteful number, since it uses less digits than its factorization.

1131230540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14702 (or 14700 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1131230540 is about 33633.7708263584. The cubic root of 1131230540 is about 1041.9583846294.

Adding to 1131230540 its reverse (450321311), we get a palindrome (1581551851).

The spelling of 1131230540 in words is "one billion, one hundred thirty-one million, two hundred thirty thousand, five hundred forty".