842195247 has 4 divisors (see below), whose sum is σ = 1122927000. Its totient is φ = 561463496.

The previous prime is 842195243. The next prime is 842195251. The reversal of 842195247 is 742591248.

842195247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (842195243) and next prime (842195251).

It is a cyclic number.

It is not a de Polignac number, because 842195247 - 2² = 842195243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 842195199 and 842195208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842195243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140365872 + ... + 140365877.

It is an arithmetic number, because the mean of its divisors is an integer number (280731750).

Almost surely, 2^842195247 is an apocalyptic number.

842195247 is a deficient number, since it is larger than the sum of its proper divisors (280731753).

842195247 is a wasteful number, since it uses less digits than its factorization.

842195247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280731752.

The product of its digits is 161280, while the sum is 42.

The square root of 842195247 is about 29020.6003900677. The cubic root of 842195247 is about 944.3600258073.

The spelling of 842195247 in words is "eight hundred forty-two million, one hundred ninety-five thousand, two hundred forty-seven".