421986241 has 2 divisors, whose sum is σ = 421986242. Its totient is φ = 421986240.

The previous prime is 421986179. The next prime is 421986247. The reversal of 421986241 is 142689124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212576400 + 209409841 = 14580^2 + 14471^2 .

It is a cyclic number.

It is not a de Polignac number, because 421986241 - 2¹⁵ = 421953473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421986241.

It is not a weakly prime, because it can be changed into another prime (421986247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210993120 + 210993121.

It is an arithmetic number, because the mean of its divisors is an integer number (210993121).

Almost surely, 2^421986241 is an apocalyptic number.

It is an amenable number.

421986241 is a deficient number, since it is larger than the sum of its proper divisors (1).

421986241 is an equidigital number, since it uses as much as digits as its factorization.

421986241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The square root of 421986241 is about 20542.3036926242. The cubic root of 421986241 is about 750.0659147994.

The spelling of 421986241 in words is "four hundred twenty-one million, nine hundred eighty-six thousand, two hundred forty-one".