12540506 has 16 divisors (see below), whose sum is σ = 21022848. Its totient is φ = 5560800.

The previous prime is 12540503. The next prime is 12540529. The reversal of 12540506 is 60504521.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12540503) 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, 6050 + ... + 7853.

It is an arithmetic number, because the mean of its divisors is an integer number (1313928).

Almost surely, 2^12540506 is an apocalyptic number.

12540506 is a deficient number, since it is larger than the sum of its proper divisors (8482342).

12540506 is a wasteful number, since it uses less digits than its factorization.

12540506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13957.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 12540506 is about 3541.2576861900. The cubic root of 12540506 is about 232.3298543191.

The spelling of 12540506 in words is "twelve million, five hundred forty thousand, five hundred six".