12509646 has 16 divisors (see below), whose sum is σ = 25601664. Its totient is φ = 4072824.

The previous prime is 12509641. The next prime is 12509683. The reversal of 12509646 is 64690521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12509641) 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, 23986 + ... + 24501.

It is an arithmetic number, because the mean of its divisors is an integer number (1600104).

Almost surely, 2^12509646 is an apocalyptic number.

12509646 is an abundant number, since it is smaller than the sum of its proper divisors (13092018).

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

12509646 is a wasteful number, since it uses less digits than its factorization.

12509646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48535.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 12509646 is about 3536.8977932646. The cubic root of 12509646 is about 232.1391233527.

The spelling of 12509646 in words is "twelve million, five hundred nine thousand, six hundred forty-six".