12865542 has 16 divisors (see below), whose sum is σ = 25827312. Its totient is φ = 4272480.

The previous prime is 12865537. The next prime is 12865543. The reversal of 12865542 is 24556821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12865543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2209 + ... + 5532.

It is an arithmetic number, because the mean of its divisors is an integer number (1614207).

Almost surely, 2^12865542 is an apocalyptic number.

12865542 is an abundant number, since it is smaller than the sum of its proper divisors (12961770).

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

12865542 is a wasteful number, since it uses less digits than its factorization.

12865542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8023.

The product of its digits is 19200, while the sum is 33.

The square root of 12865542 is about 3586.8568413027. The cubic root of 12865542 is about 234.3200019575.

The spelling of 12865542 in words is "twelve million, eight hundred sixty-five thousand, five hundred forty-two".