842426845 has 32 divisors (see below), whose sum is σ = 1163191680. Its totient is φ = 580504320.

The previous prime is 842426831. The next prime is 842426873. The reversal of 842426845 is 548624248.

842426845 = 128² + 129² + ... + 1362².

It is not a de Polignac number, because 842426845 - 2⁵ = 842426813 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77655 + ... + 87835.

It is an arithmetic number, because the mean of its divisors is an integer number (36349740).

Almost surely, 2^842426845 is an apocalyptic number.

It is an amenable number.

842426845 is a deficient number, since it is larger than the sum of its proper divisors (320764835).

842426845 is a wasteful number, since it uses less digits than its factorization.

842426845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10285.

The product of its digits is 491520, while the sum is 43.

The square root of 842426845 is about 29024.5903502530. The cubic root of 842426845 is about 944.4465820815.

The spelling of 842426845 in words is "eight hundred forty-two million, four hundred twenty-six thousand, eight hundred forty-five".