142975439 has 2 divisors, whose sum is σ = 142975440. Its totient is φ = 142975438.

The previous prime is 142975421. The next prime is 142975453. The reversal of 142975439 is 934579241.

It is a strong prime.

It is an emirp because it is prime and its reverse (934579241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142975439 - 2¹⁶ = 142909903 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142975439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142915439) 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, 71487719 + 71487720.

It is an arithmetic number, because the mean of its divisors is an integer number (71487720).

Almost surely, 2^142975439 is an apocalyptic number.

142975439 is a deficient number, since it is larger than the sum of its proper divisors (1).

142975439 is an equidigital number, since it uses as much as digits as its factorization.

142975439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 142975439 is about 11957.2337520013. The cubic root of 142975439 is about 522.9022126814.

The spelling of 142975439 in words is "one hundred forty-two million, nine hundred seventy-five thousand, four hundred thirty-nine".