12643746 has 16 divisors (see below), whose sum is σ = 25634784. Its totient is φ = 4156704.

The previous prime is 12643723. The next prime is 12643781. The reversal of 12643746 is 64734621.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13996 + ... + 14871.

It is an arithmetic number, because the mean of its divisors is an integer number (1602174).

Almost surely, 2^12643746 is an apocalyptic number.

12643746 is an abundant number, since it is smaller than the sum of its proper divisors (12991038).

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

12643746 is a wasteful number, since it uses less digits than its factorization.

12643746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28945.

The product of its digits is 24192, while the sum is 33.

The square root of 12643746 is about 3555.8045503093. The cubic root of 12643746 is about 232.9656663170.

The spelling of 12643746 in words is "twelve million, six hundred forty-three thousand, seven hundred forty-six".