1129664 has 28 divisors (see below), whose sum is σ = 2362200. Its totient is φ = 534528.

The previous prime is 1129663. The next prime is 1129679. The reversal of 1129664 is 4669211.

It is a super-2 number, since 2×1129664² = 2552281505792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1129663) 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, 752 + ... + 1680.

2^1129664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1129664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1181100).

1129664 is an abundant number, since it is smaller than the sum of its proper divisors (1232536).

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

1129664 is an equidigital number, since it uses as much as digits as its factorization.

1129664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960 (or 950 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 1129664 is about 1062.8565284176. The cubic root of 1129664 is about 104.1477190781.

The spelling of 1129664 in words is "one million, one hundred twenty-nine thousand, six hundred sixty-four".