142985239 has 2 divisors, whose sum is σ = 142985240. Its totient is φ = 142985238.

The previous prime is 142985221. The next prime is 142985243. The reversal of 142985239 is 932589241.

It is a strong prime.

It is an emirp because it is prime and its reverse (932589241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142985239 - 2⁹ = 142984727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142985195 and 142985204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142985209) 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, 71492619 + 71492620.

It is an arithmetic number, because the mean of its divisors is an integer number (71492620).

Almost surely, 2^142985239 is an apocalyptic number.

142985239 is a deficient number, since it is larger than the sum of its proper divisors (1).

142985239 is an equidigital number, since it uses as much as digits as its factorization.

142985239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 142985239 is about 11957.6435387580. The cubic root of 142985239 is about 522.9141595459.

It can be divided in two parts, 1429 and 85239, that added together give a palindrome (86668).

The spelling of 142985239 in words is "one hundred forty-two million, nine hundred eighty-five thousand, two hundred thirty-nine".