142747439 has 2 divisors, whose sum is σ = 142747440. Its totient is φ = 142747438.

The previous prime is 142747387. The next prime is 142747463. The reversal of 142747439 is 934747241.

It is a strong prime.

It is an emirp because it is prime and its reverse (934747241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142747439 - 2⁸ = 142747183 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142747396 and 142747405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142747489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71373719 + 71373720.

It is an arithmetic number, because the mean of its divisors is an integer number (71373720).

Almost surely, 2^142747439 is an apocalyptic number.

142747439 is a deficient number, since it is larger than the sum of its proper divisors (1).

142747439 is an equidigital number, since it uses as much as digits as its factorization.

142747439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 41.

The square root of 142747439 is about 11947.6959703534. The cubic root of 142747439 is about 522.6241109902.

The spelling of 142747439 in words is "one hundred forty-two million, seven hundred forty-seven thousand, four hundred thirty-nine".