12540542 has 16 divisors (see below), whose sum is σ = 21904992. Its totient is φ = 5272800.

The previous prime is 12540529. The next prime is 12540581. The reversal of 12540542 is 24504521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7709 + ... + 9192.

It is an arithmetic number, because the mean of its divisors is an integer number (1369062).

Almost surely, 2^12540542 is an apocalyptic number.

12540542 is a deficient number, since it is larger than the sum of its proper divisors (9364450).

12540542 is a wasteful number, since it uses less digits than its factorization.

12540542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16963.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 12540542 is about 3541.2627691263. The cubic root of 12540542 is about 232.3300766351.

The spelling of 12540542 in words is "twelve million, five hundred forty thousand, five hundred forty-two".