420786271 has 2 divisors, whose sum is σ = 420786272. Its totient is φ = 420786270.

The previous prime is 420786251. The next prime is 420786299. The reversal of 420786271 is 172687024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420786271 - 2¹⁵ = 420753503 is a prime.

It is a super-2 number, since 2×420786271² = 354122171724170882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420786271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420786251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210393135 + 210393136.

It is an arithmetic number, because the mean of its divisors is an integer number (210393136).

Almost surely, 2^420786271 is an apocalyptic number.

420786271 is a deficient number, since it is larger than the sum of its proper divisors (1).

420786271 is an equidigital number, since it uses as much as digits as its factorization.

420786271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 420786271 is about 20513.0756104491. The cubic root of 420786271 is about 749.3542714650.

The spelling of 420786271 in words is "four hundred twenty million, seven hundred eighty-six thousand, two hundred seventy-one".