12142147 has 2 divisors, whose sum is σ = 12142148. Its totient is φ = 12142146.

The previous prime is 12142139. The next prime is 12142177. The reversal of 12142147 is 74124121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12142147 - 2³ = 12142139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12142177) 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 as a sum of consecutive naturals, namely, 6071073 + 6071074.

It is an arithmetic number, because the mean of its divisors is an integer number (6071074).

Almost surely, 2^12142147 is an apocalyptic number.

12142147 is a deficient number, since it is larger than the sum of its proper divisors (1).

12142147 is an equidigital number, since it uses as much as digits as its factorization.

12142147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448, while the sum is 22.

The square root of 12142147 is about 3484.5583651304. The cubic root of 12142147 is about 229.8432895950.

Adding to 12142147 its reverse (74124121), we get a palindrome (86266268).

The spelling of 12142147 in words is "twelve million, one hundred forty-two thousand, one hundred forty-seven".