420000240421 has 2 divisors, whose sum is σ = 420000240422. Its totient is φ = 420000240420.

The previous prime is 420000240403. The next prime is 420000240469. The reversal of 420000240421 is 124042000024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389694305025 + 30305935396 = 624255^2 + 174086^2 .

It is a cyclic number.

It is not a de Polignac number, because 420000240421 - 2⁷ = 420000240293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420000340421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210000120210 + 210000120211.

It is an arithmetic number, because the mean of its divisors is an integer number (210000120211).

Almost surely, 2^420000240421 is an apocalyptic number.

It is an amenable number.

420000240421 is a deficient number, since it is larger than the sum of its proper divisors (1).

420000240421 is an equidigital number, since it uses as much as digits as its factorization.

420000240421 is an evil number, because the sum of its binary digits is even.

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

Adding to 420000240421 its reverse (124042000024), we get a palindrome (544042240445).

The spelling of 420000240421 in words is "four hundred twenty billion, two hundred forty thousand, four hundred twenty-one".