8142247 has 2 divisors, whose sum is σ = 8142248. Its totient is φ = 8142246.

The previous prime is 8142229. The next prime is 8142271. The reversal of 8142247 is 7422418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8142247 - 2¹⁹ = 7617959 is a prime.

It is a Chen prime.

8142247 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8142287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4071123 + 4071124.

It is an arithmetic number, because the mean of its divisors is an integer number (4071124).

Almost surely, 2^8142247 is an apocalyptic number.

8142247 is a deficient number, since it is larger than the sum of its proper divisors (1).

8142247 is an equidigital number, since it uses as much as digits as its factorization.

8142247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 28.

The square root of 8142247 is about 2853.4622829118. The cubic root of 8142247 is about 201.1784344899.

The spelling of 8142247 in words is "eight million, one hundred forty-two thousand, two hundred forty-seven".