420906271 has 2 divisors, whose sum is σ = 420906272. Its totient is φ = 420906270.

The previous prime is 420906181. The next prime is 420906301. The reversal of 420906271 is 172609024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420906271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420906071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210453135 + 210453136.

It is an arithmetic number, because the mean of its divisors is an integer number (210453136).

Almost surely, 2^420906271 is an apocalyptic number.

420906271 is a deficient number, since it is larger than the sum of its proper divisors (1).

420906271 is an equidigital number, since it uses as much as digits as its factorization.

420906271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 420906271 is about 20516.0003655683. Note that the first 3 decimals coincide. The cubic root of 420906271 is about 749.4254984133.

The spelling of 420906271 in words is "four hundred twenty million, nine hundred six thousand, two hundred seventy-one".