12490643 has 4 divisors (see below), whose sum is σ = 13626168. Its totient is φ = 11355120.

The previous prime is 12490627. The next prime is 12490663. The reversal of 12490643 is 34609421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12490643 - 2⁴ = 12490627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12490603) 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, 567746 + ... + 567767.

It is an arithmetic number, because the mean of its divisors is an integer number (3406542).

Almost surely, 2^12490643 is an apocalyptic number.

12490643 is a deficient number, since it is larger than the sum of its proper divisors (1135525).

12490643 is a wasteful number, since it uses less digits than its factorization.

12490643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135524.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 12490643 is about 3534.2103785711. The cubic root of 12490643 is about 232.0215187630.

The spelling of 12490643 in words is "twelve million, four hundred ninety thousand, six hundred forty-three".