842509259 has 2 divisors, whose sum is σ = 842509260. Its totient is φ = 842509258.

The previous prime is 842509243. The next prime is 842509303. The reversal of 842509259 is 952905248.

It is an a-pointer prime, because the next prime (842509303) can be obtained adding 842509259 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 842509259 - 2⁴ = 842509243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (842509219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421254629 + 421254630.

It is an arithmetic number, because the mean of its divisors is an integer number (421254630).

Almost surely, 2^842509259 is an apocalyptic number.

842509259 is a deficient number, since it is larger than the sum of its proper divisors (1).

842509259 is an equidigital number, since it uses as much as digits as its factorization.

842509259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 842509259 is about 29026.0100427186. The cubic root of 842509259 is about 944.4773792493.

The spelling of 842509259 in words is "eight hundred forty-two million, five hundred nine thousand, two hundred fifty-nine".