12136542 has 48 divisors (see below), whose sum is σ = 27163920. Its totient is φ = 3611520.

The previous prime is 12136517. The next prime is 12136547. The reversal of 12136542 is 24563121.

12136542 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12136547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52884 + ... + 53112.

It is an arithmetic number, because the mean of its divisors is an integer number (565915).

Almost surely, 2^12136542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12136542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13581960).

12136542 is an abundant number, since it is smaller than the sum of its proper divisors (15027378).

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

12136542 is a wasteful number, since it uses less digits than its factorization.

12136542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 318 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 12136542 is about 3483.7540096855. The cubic root of 12136542 is about 229.8079177639.

Adding to 12136542 its reverse (24563121), we get a palindrome (36699663).

It can be divided in two parts, 121 and 36542, that added together give a palindrome (36663).

The spelling of 12136542 in words is "twelve million, one hundred thirty-six thousand, five hundred forty-two".