1233664 has 36 divisors (see below), whose sum is σ = 2534560. Its totient is φ = 599040.

The previous prime is 1233653. The next prime is 1233709. The reversal of 1233664 is 4663321.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 15577 + ... + 15655.

2^1233664 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 1233664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1267280).

1233664 is an abundant number, since it is smaller than the sum of its proper divisors (1300896).

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

1233664 is an frugal number, since it uses more digits than its factorization.

1233664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 142 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

The square root of 1233664 is about 1110.7042810758. The cubic root of 1233664 is about 107.2504106859.

Adding to 1233664 its reverse (4663321), we get a palindrome (5896985).

The spelling of 1233664 in words is "one million, two hundred thirty-three thousand, six hundred sixty-four".