12646542 has 16 divisors (see below), whose sum is σ = 25770960. Its totient is φ = 4135872.

The previous prime is 12646537. The next prime is 12646547. The reversal of 12646542 is 24564621.

It is an interprime number because it is at equal distance from previous prime (12646537) and next prime (12646547).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12646547) by changing a digit.

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, 19567 + ... + 20202.

It is an arithmetic number, because the mean of its divisors is an integer number (1610685).

Almost surely, 2^12646542 is an apocalyptic number.

12646542 is an abundant number, since it is smaller than the sum of its proper divisors (13124418).

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

12646542 is a wasteful number, since it uses less digits than its factorization.

12646542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39827.

The product of its digits is 11520, while the sum is 30.

The square root of 12646542 is about 3556.1976885432. The cubic root of 12646542 is about 232.9828374939.

The spelling of 12646542 in words is "twelve million, six hundred forty-six thousand, five hundred forty-two".