1131899 has 8 divisors (see below), whose sum is σ = 1222560. Its totient is φ = 1044736.

The previous prime is 1131883. The next prime is 1131913. The reversal of 1131899 is 9981311.

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

It is a cyclic number.

It is not a de Polignac number, because 1131899 - 2⁴ = 1131883 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1131829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182 + ... + 1515.

It is an arithmetic number, because the mean of its divisors is an integer number (152820).

2^1131899 is an apocalyptic number.

1131899 is a deficient number, since it is larger than the sum of its proper divisors (90661).

1131899 is a wasteful number, since it uses less digits than its factorization.

1131899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749.

The product of its digits is 1944, while the sum is 32.

The square root of 1131899 is about 1063.9074207843. The cubic root of 1131899 is about 104.2163580161.

The spelling of 1131899 in words is "one million, one hundred thirty-one thousand, eight hundred ninety-nine".