1131560 has 16 divisors (see below), whose sum is σ = 2546100. Its totient is φ = 452608.

The previous prime is 1131553. The next prime is 1131569. The reversal of 1131560 is 651311.

1131560 = T₂₉₅ + T₂₉₆ + ... + T₃₁₈.

It can be written as a sum of positive squares in 2 ways, for example, as 1085764 + 45796 = 1042^2 + 214^2 .

It is not an unprimeable number, because it can be changed into a prime (1131569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14105 + ... + 14184.

2^1131560 is an apocalyptic number.

1131560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131560 is an abundant number, since it is smaller than the sum of its proper divisors (1414540).

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

1131560 is a wasteful number, since it uses less digits than its factorization.

1131560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28300 (or 28296 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1131560 is about 1063.7480904801. The cubic root of 1131560 is about 104.2059528259.

Adding to 1131560 its reverse (651311), we get a palindrome (1782871).

Subtracting from 1131560 its reverse (651311), we obtain a square (480249 = 693²).

The spelling of 1131560 in words is "one million, one hundred thirty-one thousand, five hundred sixty".