142910639 has 2 divisors, whose sum is σ = 142910640. Its totient is φ = 142910638.

The previous prime is 142910633. The next prime is 142910683. The reversal of 142910639 is 936019241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142910639 - 2⁴ = 142910623 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142910599 and 142910608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142910633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71455319 + 71455320.

It is an arithmetic number, because the mean of its divisors is an integer number (71455320).

Almost surely, 2^142910639 is an apocalyptic number.

142910639 is a deficient number, since it is larger than the sum of its proper divisors (1).

142910639 is an equidigital number, since it uses as much as digits as its factorization.

142910639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 142910639 is about 11954.5237880896. The cubic root of 142910639 is about 522.8232033449.

The spelling of 142910639 in words is "one hundred forty-two million, nine hundred ten thousand, six hundred thirty-nine".