12542166 has 144 divisors (see below), whose sum is σ = 36541440. Its totient is φ = 3032640.

The previous prime is 12542143. The next prime is 12542177. The reversal of 12542166 is 66124521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 404571 + ... + 404601.

It is an arithmetic number, because the mean of its divisors is an integer number (253760).

Almost surely, 2^12542166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12542166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18270720).

12542166 is an abundant number, since it is smaller than the sum of its proper divisors (23999274).

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

12542166 is a wasteful number, since it uses less digits than its factorization.

12542166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 75 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12542166 is about 3541.4920584409. The cubic root of 12542166 is about 232.3401051161.

Adding to 12542166 its reverse (66124521), we get a palindrome (78666687).

The spelling of 12542166 in words is "twelve million, five hundred forty-two thousand, one hundred sixty-six".