12540642 has 16 divisors (see below), whose sum is σ = 25116480. Its totient is φ = 4174352.

The previous prime is 12540641. The next prime is 12540653. The reversal of 12540642 is 24604521.

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 7 ways as a sum of consecutive naturals, for example, 6484 + ... + 8192.

It is an arithmetic number, because the mean of its divisors is an integer number (1569780).

Almost surely, 2^12540642 is an apocalyptic number.

12540642 is an abundant number, since it is smaller than the sum of its proper divisors (12575838).

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

12540642 is a wasteful number, since it uses less digits than its factorization.

12540642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 12540642 is about 3541.2768883554. The cubic root of 12540642 is about 232.3306941775.

The spelling of 12540642 in words is "twelve million, five hundred forty thousand, six hundred forty-two".