1131890 has 8 divisors (see below), whose sum is σ = 2037420. Its totient is φ = 452752.

The previous prime is 1131883. The next prime is 1131913. The reversal of 1131890 is 981311.

It can be written as a sum of positive squares in 2 ways, for example, as 1117249 + 14641 = 1057^2 + 121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 56585 + ... + 56604.

2^1131890 is an apocalyptic number.

1131890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131890 is a deficient number, since it is larger than the sum of its proper divisors (905530).

1131890 is a wasteful number, since it uses less digits than its factorization.

1131890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113196.

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

The square root of 1131890 is about 1063.9031910846. The cubic root of 1131890 is about 104.2160817989.

The spelling of 1131890 in words is "one million, one hundred thirty-one thousand, eight hundred ninety".