842540342 has 16 divisors (see below), whose sum is σ = 1451843232. Its totient is φ = 359216640.

The previous prime is 842540327. The next prime is 842540359. The reversal of 842540342 is 243045248.

It is a junction number, because it is equal to n+sod(n) for n = 842540299 and 842540308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153209 + ... + 158612.

It is an arithmetic number, because the mean of its divisors is an integer number (90740202).

Almost surely, 2^842540342 is an apocalyptic number.

842540342 is a deficient number, since it is larger than the sum of its proper divisors (609302890).

842540342 is a wasteful number, since it uses less digits than its factorization.

842540342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312023.

The product of its (nonzero) digits is 30720, while the sum is 32.

The square root of 842540342 is about 29026.5454713440. The cubic root of 842540342 is about 944.4889940887.

The spelling of 842540342 in words is "eight hundred forty-two million, five hundred forty thousand, three hundred forty-two".