142806439 has 2 divisors, whose sum is σ = 142806440. Its totient is φ = 142806438.

The previous prime is 142806437. The next prime is 142806457. The reversal of 142806439 is 934608241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142806439 - 2¹ = 142806437 is a prime.

Together with 142806437, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142806398 and 142806407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142806437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71403219 + 71403220.

It is an arithmetic number, because the mean of its divisors is an integer number (71403220).

Almost surely, 2^142806439 is an apocalyptic number.

142806439 is a deficient number, since it is larger than the sum of its proper divisors (1).

142806439 is an equidigital number, since it uses as much as digits as its factorization.

142806439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 142806439 is about 11950.1648105790. The cubic root of 142806439 is about 522.6961042849.

The spelling of 142806439 in words is "one hundred forty-two million, eight hundred six thousand, four hundred thirty-nine".