421342241 has 2 divisors, whose sum is σ = 421342242. Its totient is φ = 421342240.

The previous prime is 421342223. The next prime is 421342253. The reversal of 421342241 is 142243124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408201616 + 13140625 = 20204^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 421342241 - 2⁶ = 421342177 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (421342261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210671120 + 210671121.

It is an arithmetic number, because the mean of its divisors is an integer number (210671121).

Almost surely, 2^421342241 is an apocalyptic number.

It is an amenable number.

421342241 is a deficient number, since it is larger than the sum of its proper divisors (1).

421342241 is an equidigital number, since it uses as much as digits as its factorization.

421342241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 23.

The square root of 421342241 is about 20526.6227373136. The cubic root of 421342241 is about 749.6841579734.

Adding to 421342241 its reverse (142243124), we get a palindrome (563585365).

The spelling of 421342241 in words is "four hundred twenty-one million, three hundred forty-two thousand, two hundred forty-one".