1199664 has 40 divisors (see below), whose sum is σ = 3444720. Its totient is φ = 399744.

The previous prime is 1199663. The next prime is 1199677. The reversal of 1199664 is 4669911.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1199663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957 + ... + 1820.

It is an arithmetic number, because the mean of its divisors is an integer number (86118).

2^1199664 is an apocalyptic number.

It is an amenable number.

1199664 is an abundant number, since it is smaller than the sum of its proper divisors (2245056).

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

1199664 is a wasteful number, since it uses less digits than its factorization.

1199664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2794 (or 2782 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 1199664 is about 1095.2917419574. The cubic root of 1199664 is about 106.2559378458.

The spelling of 1199664 in words is "one million, one hundred ninety-nine thousand, six hundred sixty-four".