842138265 has 16 divisors (see below), whose sum is σ = 1426681728. Its totient is φ = 422720256.

The previous prime is 842138243. The next prime is 842138267. The reversal of 842138265 is 562831248.

It is not a de Polignac number, because 842138265 - 2⁷ = 842138137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (842138267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1650997 + ... + 1651506.

It is an arithmetic number, because the mean of its divisors is an integer number (89167608).

Almost surely, 2^842138265 is an apocalyptic number.

842138265 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

842138265 is a deficient number, since it is larger than the sum of its proper divisors (584543463).

842138265 is a wasteful number, since it uses less digits than its factorization.

842138265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302528.

The product of its digits is 92160, while the sum is 39.

The square root of 842138265 is about 29019.6186225801. The cubic root of 842138265 is about 944.3387272083.

The spelling of 842138265 in words is "eight hundred forty-two million, one hundred thirty-eight thousand, two hundred sixty-five".