12142666 has 16 divisors (see below), whose sum is σ = 19080000. Its totient is φ = 5795724.

The previous prime is 12142661. The next prime is 12142667. The reversal of 12142666 is 66624121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142661) 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, 24085 + ... + 24583.

It is an arithmetic number, because the mean of its divisors is an integer number (1192500).

Almost surely, 2^12142666 is an apocalyptic number.

12142666 is a deficient number, since it is larger than the sum of its proper divisors (6937334).

12142666 is an frugal number, since it uses more digits than its factorization.

12142666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 524 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 12142666 is about 3484.6328357519. The cubic root of 12142666 is about 229.8465643307.

Adding to 12142666 its reverse (66624121), we get a palindrome (78766787).

The spelling of 12142666 in words is "twelve million, one hundred forty-two thousand, six hundred sixty-six".