420242643 has 6 divisors (see below), whose sum is σ = 607017164. Its totient is φ = 280161756.

The previous prime is 420242623. The next prime is 420242653. The reversal of 420242643 is 346242024.

It is not a de Polignac number, because 420242643 - 2¹² = 420238547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420242623) 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 in 5 ways as a sum of consecutive naturals, for example, 23346805 + ... + 23346822.

Almost surely, 2^420242643 is an apocalyptic number.

420242643 is a deficient number, since it is larger than the sum of its proper divisors (186774521).

420242643 is a wasteful number, since it uses less digits than its factorization.

420242643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46693633 (or 46693630 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 420242643 is about 20499.8205601903. The cubic root of 420242643 is about 749.0314270270.

Adding to 420242643 its reverse (346242024), we get a palindrome (766484667).

The spelling of 420242643 in words is "four hundred twenty million, two hundred forty-two thousand, six hundred forty-three".