420515507 has 2 divisors, whose sum is σ = 420515508. Its totient is φ = 420515506.

The previous prime is 420515497. The next prime is 420515539. The reversal of 420515507 is 705515024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420515507 - 2⁶ = 420515443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420515507.

It is not a weakly prime, because it can be changed into another prime (420515567) 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, 210257753 + 210257754.

It is an arithmetic number, because the mean of its divisors is an integer number (210257754).

Almost surely, 2^420515507 is an apocalyptic number.

420515507 is a deficient number, since it is larger than the sum of its proper divisors (1).

420515507 is an equidigital number, since it uses as much as digits as its factorization.

420515507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 420515507 is about 20506.4747579880. The cubic root of 420515507 is about 749.1935075894.

The spelling of 420515507 in words is "four hundred twenty million, five hundred fifteen thousand, five hundred seven".