1131664 has 10 divisors (see below), whose sum is σ = 2192630. Its totient is φ = 565824.

The previous prime is 1131653. The next prime is 1131671. The reversal of 1131664 is 4661311.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1016064 + 115600 = 1008^2 + 340^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35349 + ... + 35380.

It is an arithmetic number, because the mean of its divisors is an integer number (219263).

2^1131664 is an apocalyptic number.

It is an amenable number.

1131664 is a deficient number, since it is larger than the sum of its proper divisors (1060966).

1131664 is an equidigital number, since it uses as much as digits as its factorization.

1131664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70737 (or 70731 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 1131664 is about 1063.7969731109. The cubic root of 1131664 is about 104.2091451996.

Adding to 1131664 its product of digits (432), we get a square (1132096 = 1064²).

Adding to 1131664 its reverse (4661311), we get a palindrome (5792975).

The spelling of 1131664 in words is "one million, one hundred thirty-one thousand, six hundred sixty-four".