12142639 has 2 divisors, whose sum is σ = 12142640. Its totient is φ = 12142638.

The previous prime is 12142631. The next prime is 12142661. The reversal of 12142639 is 93624121.

12142639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12142639 - 2³ = 12142631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12142631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6071319 + 6071320.

It is an arithmetic number, because the mean of its divisors is an integer number (6071320).

Almost surely, 2^12142639 is an apocalyptic number.

12142639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12142639 is an equidigital number, since it uses as much as digits as its factorization.

12142639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 12142639 is about 3484.6289615969. The cubic root of 12142639 is about 229.8463939710.

The spelling of 12142639 in words is "twelve million, one hundred forty-two thousand, six hundred thirty-nine".