142478939 has 2 divisors, whose sum is σ = 142478940. Its totient is φ = 142478938.

The previous prime is 142478927. The next prime is 142479011. The reversal of 142478939 is 939874241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142478939 - 2²⁰ = 141430363 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142478893 and 142478902.

It is not a weakly prime, because it can be changed into another prime (142478339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71239469 + 71239470.

It is an arithmetic number, because the mean of its divisors is an integer number (71239470).

Almost surely, 2^142478939 is an apocalyptic number.

142478939 is a deficient number, since it is larger than the sum of its proper divisors (1).

142478939 is an equidigital number, since it uses as much as digits as its factorization.

142478939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 142478939 is about 11936.4542055001. The cubic root of 142478939 is about 522.2962296922.

The spelling of 142478939 in words is "one hundred forty-two million, four hundred seventy-eight thousand, nine hundred thirty-nine".