12108642 has 64 divisors (see below), whose sum is σ = 30342144. Its totient is φ = 3136320.

The previous prime is 12108637. The next prime is 12108647. The reversal of 12108642 is 24680121.

It is an interprime number because it is at equal distance from previous prime (12108637) and next prime (12108647).

It is a super-2 number, since 2×12108642² = 293238422168328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12108647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36417 + ... + 36747.

It is an arithmetic number, because the mean of its divisors is an integer number (474096).

Almost surely, 2^12108642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12108642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15171072).

12108642 is an abundant number, since it is smaller than the sum of its proper divisors (18233502).

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

12108642 is a wasteful number, since it uses less digits than its factorization.

12108642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12108642 is about 3479.7474046258. The cubic root of 12108642 is about 229.6316852394.

Adding to 12108642 its reverse (24680121), we get a palindrome (36788763).

The spelling of 12108642 in words is "twelve million, one hundred eight thousand, six hundred forty-two".