420102643 has 2 divisors, whose sum is σ = 420102644. Its totient is φ = 420102642.

The previous prime is 420102637. The next prime is 420102649. The reversal of 420102643 is 346201024.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (420102637) and next prime (420102649).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420102643 is a prime.

It is not a weakly prime, because it can be changed into another prime (420102649) 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, 210051321 + 210051322.

It is an arithmetic number, because the mean of its divisors is an integer number (210051322).

Almost surely, 2^420102643 is an apocalyptic number.

420102643 is a deficient number, since it is larger than the sum of its proper divisors (1).

420102643 is an equidigital number, since it uses as much as digits as its factorization.

420102643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 420102643 is about 20496.4056117164. The cubic root of 420102643 is about 748.9482401281.

Adding to 420102643 its reverse (346201024), we get a palindrome (766303667).

The spelling of 420102643 in words is "four hundred twenty million, one hundred two thousand, six hundred forty-three".