1131552 has 36 divisors (see below), whose sum is σ = 3218670. Its totient is φ = 377088.

The previous prime is 1131547. The next prime is 1131553. The reversal of 1131552 is 2551311.

1131552 is a `hidden beast` number, since 113 + 1 + 552 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1089936 + 41616 = 1044^2 + 204^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1131553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1677 + ... + 2252.

2^1131552 is an apocalyptic number.

1131552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1131552 is an abundant number, since it is smaller than the sum of its proper divisors (2087118).

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

1131552 is a wasteful number, since it uses less digits than its factorization.

1131552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3945 (or 3934 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 1131552 is about 1063.7443301847. The cubic root of 1131552 is about 104.2057072506.

Adding to 1131552 its reverse (2551311), we get a palindrome (3682863).

The spelling of 1131552 in words is "one million, one hundred thirty-one thousand, five hundred fifty-two".