420061601 has 2 divisors, whose sum is σ = 420061602. Its totient is φ = 420061600.

The previous prime is 420061559. The next prime is 420061639. The reversal of 420061601 is 106160024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230310976 + 189750625 = 15176^2 + 13775^2 .

It is a cyclic number.

It is not a de Polignac number, because 420061601 - 2¹⁰ = 420060577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (420067601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210030800 + 210030801.

It is an arithmetic number, because the mean of its divisors is an integer number (210030801).

Almost surely, 2^420061601 is an apocalyptic number.

It is an amenable number.

420061601 is a deficient number, since it is larger than the sum of its proper divisors (1).

420061601 is an equidigital number, since it uses as much as digits as its factorization.

420061601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 420061601 is about 20495.4043873255. The cubic root of 420061601 is about 748.9238497914.

The spelling of 420061601 in words is "four hundred twenty million, sixty-one thousand, six hundred one".