1131237200 has 120 divisors (see below), whose sum is σ = 2901451200. Its totient is φ = 422599680.

The previous prime is 1131237199. The next prime is 1131237209. The reversal of 1131237200 is 27321311.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131237209) 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, 553781 + ... + 555819.

It is an arithmetic number, because the mean of its divisors is an integer number (24178760).

Almost surely, 2^1131237200 is an apocalyptic number.

1131237200 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 1131237200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1450725600).

1131237200 is an abundant number, since it is smaller than the sum of its proper divisors (1770214000).

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

1131237200 is a wasteful number, since it uses less digits than its factorization.

1131237200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149 (or 2138 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1131237200 is about 33633.8698338446. The cubic root of 1131237200 is about 1041.9604294320.

Adding to 1131237200 its reverse (27321311), we get a palindrome (1158558511).

The spelling of 1131237200 in words is "one billion, one hundred thirty-one million, two hundred thirty-seven thousand, two hundred".