12642154 has 16 divisors (see below), whose sum is σ = 22134528. Its totient is φ = 5302512.

The previous prime is 12642139. The next prime is 12642181. The reversal of 12642154 is 45124621.

It is a happy number.

12642154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8949 + ... + 10264.

It is an arithmetic number, because the mean of its divisors is an integer number (1383408).

Almost surely, 2^12642154 is an apocalyptic number.

12642154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12642154 is a deficient number, since it is larger than the sum of its proper divisors (9492374).

12642154 is a wasteful number, since it uses less digits than its factorization.

12642154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19269.

The product of its digits is 1920, while the sum is 25.

The square root of 12642154 is about 3555.5806839390. The cubic root of 12642154 is about 232.9558881783.

Adding to 12642154 its reverse (45124621), we get a palindrome (57766775).

The spelling of 12642154 in words is "twelve million, six hundred forty-two thousand, one hundred fifty-four".