420448247 has 2 divisors, whose sum is σ = 420448248. Its totient is φ = 420448246.

The previous prime is 420448213. The next prime is 420448307. The reversal of 420448247 is 742844024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420448247 - 2¹² = 420444151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420448547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210224123 + 210224124.

It is an arithmetic number, because the mean of its divisors is an integer number (210224124).

Almost surely, 2^420448247 is an apocalyptic number.

420448247 is a deficient number, since it is larger than the sum of its proper divisors (1).

420448247 is an equidigital number, since it uses as much as digits as its factorization.

420448247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57344, while the sum is 35.

The square root of 420448247 is about 20504.8347225721. The cubic root of 420448247 is about 749.1535618233.

The spelling of 420448247 in words is "four hundred twenty million, four hundred forty-eight thousand, two hundred forty-seven".