427247 has 2 divisors, whose sum is σ = 427248. Its totient is φ = 427246.

The previous prime is 427243. The next prime is 427249. The reversal of 427247 is 742724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 427247 - 2² = 427243 is a prime.

Together with 427249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427241) 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 as a sum of consecutive naturals, namely, 213623 + 213624.

It is an arithmetic number, because the mean of its divisors is an integer number (213624).

2⁴²⁷²⁴⁷ is an apocalyptic number.

427247 is a deficient number, since it is larger than the sum of its proper divisors (1).

427247 is an equidigital number, since it uses as much as digits as its factorization.

427247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 26.

The square root of 427247 is about 653.6413389620. The cubic root of 427247 is about 75.3169990081.

The spelling of 427247 in words is "four hundred twenty-seven thousand, two hundred forty-seven", and thus it is an iban number.