1131409200 has 90 divisors (see below), whose sum is σ = 3628017172. Its totient is φ = 301398400.

The previous prime is 1131409187. The next prime is 1131409231. The reversal of 1131409200 is 29041311.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1164715 + ... + 1165685.

Almost surely, 2^1131409200 is an apocalyptic number.

1131409200 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 1131409200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814008586).

1131409200 is an abundant number, since it is smaller than the sum of its proper divisors (2496607972).

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

1131409200 is an frugal number, since it uses more digits than its factorization.

1131409200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963 (or 981 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1131409200 is about 33636.4266829876. The cubic root of 1131409200 is about 1042.0132353662.

The spelling of 1131409200 in words is "one billion, one hundred thirty-one million, four hundred nine thousand, two hundred".