1131199 has 4 divisors (see below), whose sum is σ = 1133440. Its totient is φ = 1128960.

The previous prime is 1131191. The next prime is 1131217. The reversal of 1131199 is 9911311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9911311 = 293 ⋅33827.

It is a cyclic number.

It is not a de Polignac number, because 1131199 - 2³ = 1131191 is a prime.

It is a super-2 number, since 2×1131199² = 2559222355202, which contains 22 as substring.

It is a Duffinian number.

1131199 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131191) 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 3 ways as a sum of consecutive naturals, for example, 34 + ... + 1504.

It is an arithmetic number, because the mean of its divisors is an integer number (283360).

2^1131199 is an apocalyptic number.

1131199 is a deficient number, since it is larger than the sum of its proper divisors (2241).

1131199 is an equidigital number, since it uses as much as digits as its factorization.

1131199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240.

The product of its digits is 243, while the sum is 25.

The square root of 1131199 is about 1063.5783939137. The cubic root of 1131199 is about 104.1948700876.

The spelling of 1131199 in words is "one million, one hundred thirty-one thousand, one hundred ninety-nine".