1131900 has 144 divisors (see below), whose sum is σ = 4166400. Its totient is φ = 235200.

The previous prime is 1131883. The next prime is 1131913. The reversal of 1131900 is 91311.

It is a super-2 number, since 2×1131900² = 2562395220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1131900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102895 + ... + 102905.

2^1131900 is an apocalyptic number.

1131900 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 1131900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2083200).

1131900 is an abundant number, since it is smaller than the sum of its proper divisors (3034500).

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

1131900 is a wasteful number, since it uses less digits than its factorization.

1131900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 1131900 is about 1063.9078907499. The cubic root of 1131900 is about 104.2163887068.

The spelling of 1131900 in words is "one million, one hundred thirty-one thousand, nine hundred".