1131660 has 36 divisors (see below), whose sum is σ = 3433248. Its totient is φ = 301728.

The previous prime is 1131653. The next prime is 1131671. The reversal of 1131660 is 661311.

1131660 is a `hidden beast` number, since 1 + 1 + 3 + 1 + 660 = 666.

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 a plaindrome in base 16.

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, 2964 + ... + 3323.

It is an arithmetic number, because the mean of its divisors is an integer number (95368).

2^1131660 is an apocalyptic number.

1131660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131660 is an abundant number, since it is smaller than the sum of its proper divisors (2301588).

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

1131660 is a wasteful number, since it uses less digits than its factorization.

1131660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6302 (or 6297 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1131660 is about 1063.7950930513. The cubic root of 1131660 is about 104.2090224196.

Adding to 1131660 its reverse (661311), we get a palindrome (1792971).

The spelling of 1131660 in words is "one million, one hundred thirty-one thousand, six hundred sixty".