420522001 has 2 divisors, whose sum is σ = 420522002. Its totient is φ = 420522000.

The previous prime is 420521993. The next prime is 420522023. The reversal of 420522001 is 100225024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330366976 + 90155025 = 18176^2 + 9495^2 .

It is a cyclic number.

It is not a de Polignac number, because 420522001 - 2³ = 420521993 is a prime.

It is not a weakly prime, because it can be changed into another prime (420522061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210261000 + 210261001.

It is an arithmetic number, because the mean of its divisors is an integer number (210261001).

Almost surely, 2^420522001 is an apocalyptic number.

It is an amenable number.

420522001 is a deficient number, since it is larger than the sum of its proper divisors (1).

420522001 is an equidigital number, since it uses as much as digits as its factorization.

420522001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 420522001 is about 20506.6330976101. The cubic root of 420522001 is about 749.1973641555.

Adding to 420522001 its reverse (100225024), we get a palindrome (520747025).

The spelling of 420522001 in words is "four hundred twenty million, five hundred twenty-two thousand, one".