420736501 has 2 divisors, whose sum is σ = 420736502. Its totient is φ = 420736500.

The previous prime is 420736489. The next prime is 420736517. The reversal of 420736501 is 105637024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261598276 + 159138225 = 16174^2 + 12615^2 .

It is a cyclic number.

It is not a de Polignac number, because 420736501 - 2⁵ = 420736469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420736501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420736571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210368250 + 210368251.

It is an arithmetic number, because the mean of its divisors is an integer number (210368251).

Almost surely, 2^420736501 is an apocalyptic number.

It is an amenable number.

420736501 is a deficient number, since it is larger than the sum of its proper divisors (1).

420736501 is an equidigital number, since it uses as much as digits as its factorization.

420736501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 420736501 is about 20511.8624459116. The cubic root of 420736501 is about 749.3247261153.

The spelling of 420736501 in words is "four hundred twenty million, seven hundred thirty-six thousand, five hundred one".