420420241 has 2 divisors, whose sum is σ = 420420242. Its totient is φ = 420420240.

The previous prime is 420420179. The next prime is 420420269. The reversal of 420420241 is 142024024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 260144641 + 160275600 = 16129^2 + 12660^2 .

It is a cyclic number.

It is not a de Polignac number, because 420420241 - 2¹⁷ = 420289169 is a prime.

It is not a weakly prime, because it can be changed into another prime (420420281) 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, 210210120 + 210210121.

It is an arithmetic number, because the mean of its divisors is an integer number (210210121).

Almost surely, 2^420420241 is an apocalyptic number.

It is an amenable number.

420420241 is a deficient number, since it is larger than the sum of its proper divisors (1).

420420241 is an equidigital number, since it uses as much as digits as its factorization.

420420241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 420420241 is about 20504.1517990869. The cubic root of 420420241 is about 749.1369277820.

Adding to 420420241 its reverse (142024024), we get a palindrome (562444265).

The spelling of 420420241 in words is "four hundred twenty million, four hundred twenty thousand, two hundred forty-one".