420115243 has 2 divisors, whose sum is σ = 420115244. Its totient is φ = 420115242.

The previous prime is 420115231. The next prime is 420115247. The reversal of 420115243 is 342511024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420115243 - 2⁵ = 420115211 is a prime.

It is not a weakly prime, because it can be changed into another prime (420115247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210057621 + 210057622.

It is an arithmetic number, because the mean of its divisors is an integer number (210057622).

Almost surely, 2^420115243 is an apocalyptic number.

420115243 is a deficient number, since it is larger than the sum of its proper divisors (1).

420115243 is an equidigital number, since it uses as much as digits as its factorization.

420115243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 420115243 is about 20496.7129803781. The cubic root of 420115243 is about 748.9557277057.

Adding to 420115243 its reverse (342511024), we get a palindrome (762626267).

The spelling of 420115243 in words is "four hundred twenty million, one hundred fifteen thousand, two hundred forty-three".