1131144 has 32 divisors (see below), whose sum is σ = 3232320. Its totient is φ = 323136.

The previous prime is 1131139. The next prime is 1131157. The reversal of 1131144 is 4411311.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3199 + ... + 3534.

It is an arithmetic number, because the mean of its divisors is an integer number (101010).

2^1131144 is an apocalyptic number.

1131144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1131144 is an abundant number, since it is smaller than the sum of its proper divisors (2101176).

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

1131144 is a wasteful number, since it uses less digits than its factorization.

1131144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749 (or 6745 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 1131144 is about 1063.5525374893. The cubic root of 1131144 is about 104.1931813748.

Adding to 1131144 its reverse (4411311), we get a palindrome (5542455).

It can be divided in two parts, 1131 and 144, that added together give a triangular number (1275 = T₅₀).

The spelling of 1131144 in words is "one million, one hundred thirty-one thousand, one hundred forty-four".