420131269 has 2 divisors, whose sum is σ = 420131270. Its totient is φ = 420131268.

The previous prime is 420131267. The next prime is 420131273. The reversal of 420131269 is 962131024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351075169 + 69056100 = 18737^2 + 8310^2 .

It is a cyclic number.

It is not a de Polignac number, because 420131269 - 2¹ = 420131267 is a prime.

It is a super-2 number, since 2×420131269² = 353020566383100722, which contains 22 as substring.

Together with 420131267, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420131267) 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 as a sum of consecutive naturals, namely, 210065634 + 210065635.

It is an arithmetic number, because the mean of its divisors is an integer number (210065635).

Almost surely, 2^420131269 is an apocalyptic number.

It is an amenable number.

420131269 is a deficient number, since it is larger than the sum of its proper divisors (1).

420131269 is an equidigital number, since it uses as much as digits as its factorization.

420131269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 420131269 is about 20497.1039173831. The cubic root of 420131269 is about 748.9652509751.

The spelling of 420131269 in words is "four hundred twenty million, one hundred thirty-one thousand, two hundred sixty-nine".