1131145 has 12 divisors (see below), whose sum is σ = 1411020. Its totient is φ = 870464.

The previous prime is 1131139. The next prime is 1131157. The reversal of 1131145 is 5411311.

It can be written as a sum of positive squares in 6 ways, for example, as 104976 + 1026169 = 324^2 + 1013^2 .

It is not a de Polignac number, because 1131145 - 2⁵ = 1131113 is a prime.

It is a super-2 number, since 2×1131145² = 2558978022050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4071 + ... + 4339.

It is an arithmetic number, because the mean of its divisors is an integer number (117585).

2^1131145 is an apocalyptic number.

It is an amenable number.

1131145 is a deficient number, since it is larger than the sum of its proper divisors (279875).

1131145 is an equidigital number, since it uses as much as digits as its factorization.

1131145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 303 counting only the distinct ones).

The product of its digits is 60, while the sum is 16.

The square root of 1131145 is about 1063.5530076118. The cubic root of 1131145 is about 104.1932120791.

Adding to 1131145 its reverse (5411311), we get a palindrome (6542456).

The spelling of 1131145 in words is "one million, one hundred thirty-one thousand, one hundred forty-five".