420512447 has 2 divisors, whose sum is σ = 420512448. Its totient is φ = 420512446.

The previous prime is 420512423. The next prime is 420512479. The reversal of 420512447 is 744215024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420512447 - 2¹⁶ = 420446911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420512347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210256223 + 210256224.

It is an arithmetic number, because the mean of its divisors is an integer number (210256224).

Almost surely, 2^420512447 is an apocalyptic number.

420512447 is a deficient number, since it is larger than the sum of its proper divisors (1).

420512447 is an equidigital number, since it uses as much as digits as its factorization.

420512447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 420512447 is about 20506.4001472711. The cubic root of 420512447 is about 749.1916903455.

The spelling of 420512447 in words is "four hundred twenty million, five hundred twelve thousand, four hundred forty-seven".