142239239 has 2 divisors, whose sum is σ = 142239240. Its totient is φ = 142239238.

The previous prime is 142239217. The next prime is 142239247. The reversal of 142239239 is 932932241.

It is a strong prime.

It is an emirp because it is prime and its reverse (932932241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142239239 - 2¹² = 142235143 is a prime.

It is a super-3 number, since 3×142239239³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142239199 and 142239208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142239269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71119619 + 71119620.

It is an arithmetic number, because the mean of its divisors is an integer number (71119620).

Almost surely, 2^142239239 is an apocalyptic number.

142239239 is a deficient number, since it is larger than the sum of its proper divisors (1).

142239239 is an equidigital number, since it uses as much as digits as its factorization.

142239239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 142239239 is about 11926.4093087568. The cubic root of 142239239 is about 522.0031695858.

The spelling of 142239239 in words is "one hundred forty-two million, two hundred thirty-nine thousand, two hundred thirty-nine".