842747 has 2 divisors, whose sum is σ = 842748. Its totient is φ = 842746.

The previous prime is 842729. The next prime is 842759. The reversal of 842747 is 747248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 842747 - 2¹⁴ = 826363 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (842767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421373 + 421374.

It is an arithmetic number, because the mean of its divisors is an integer number (421374).

2⁸⁴²⁷⁴⁷ is an apocalyptic number.

842747 is a deficient number, since it is larger than the sum of its proper divisors (1).

842747 is an equidigital number, since it uses as much as digits as its factorization.

842747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 32.

The square root of 842747 is about 918.0125271476. The cubic root of 842747 is about 94.4566209086.

The spelling of 842747 in words is "eight hundred forty-two thousand, seven hundred forty-seven".