1131980 has 12 divisors (see below), whose sum is σ = 2377200. Its totient is φ = 452784.

The previous prime is 1131973. The next prime is 1131997. The reversal of 1131980 is 891311.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28280 + ... + 28319.

It is an arithmetic number, because the mean of its divisors is an integer number (198100).

2^1131980 is an apocalyptic number.

1131980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131980 is an abundant number, since it is smaller than the sum of its proper divisors (1245220).

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

1131980 is a wasteful number, since it uses less digits than its factorization.

1131980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56608 (or 56606 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1131980 is about 1063.9454873254. The cubic root of 1131980 is about 104.2188439044.

The spelling of 1131980 in words is "one million, one hundred thirty-one thousand, nine hundred eighty".