12345664 has 28 divisors (see below), whose sum is σ = 25566624. Its totient is φ = 5903744.

The previous prime is 12345653. The next prime is 12345701. The reversal of 12345664 is 46654321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2722 + ... + 5665.

Almost surely, 2^12345664 is an apocalyptic number.

It is an amenable number.

12345664 is an abundant number, since it is smaller than the sum of its proper divisors (13220960).

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

12345664 is an equidigital number, since it uses as much as digits as its factorization.

12345664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8422 (or 8412 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 12345664 is about 3513.6397083366. The cubic root of 12345664 is about 231.1203311027.

Adding to 12345664 its reverse (46654321), we get a palindrome (58999985).

The spelling of 12345664 in words is "twelve million, three hundred forty-five thousand, six hundred sixty-four".