420047 has 2 divisors, whose sum is σ = 420048. Its totient is φ = 420046.

The previous prime is 420041. The next prime is 420073. The reversal of 420047 is 740024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420047 - 2⁸ = 419791 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420041) 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, 210023 + 210024.

It is an arithmetic number, because the mean of its divisors is an integer number (210024).

2⁴²⁰⁰⁴⁷ is an apocalyptic number.

420047 is a deficient number, since it is larger than the sum of its proper divisors (1).

420047 is an equidigital number, since it uses as much as digits as its factorization.

420047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 420047 is about 648.1103301136. The cubic root of 420047 is about 74.8915172363.

The spelling of 420047 in words is "four hundred twenty thousand, forty-seven", and thus it is an iban number.