12540646 has 8 divisors (see below), whose sum is σ = 19801080. Its totient is φ = 5940288.

The previous prime is 12540641. The next prime is 12540653. The reversal of 12540646 is 64604521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540641) 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, 164971 + ... + 165046.

It is an arithmetic number, because the mean of its divisors is an integer number (2475135).

Almost surely, 2^12540646 is an apocalyptic number.

12540646 is a deficient number, since it is larger than the sum of its proper divisors (7260434).

12540646 is a wasteful number, since it uses less digits than its factorization.

12540646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330038.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 12540646 is about 3541.2774531234. The cubic root of 12540646 is about 232.3307188791.

The spelling of 12540646 in words is "twelve million, five hundred forty thousand, six hundred forty-six".