421302641 has 2 divisors, whose sum is σ = 421302642. Its totient is φ = 421302640.

The previous prime is 421302631. The next prime is 421302703. The reversal of 421302641 is 146203124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394221025 + 27081616 = 19855^2 + 5204^2 .

It is a cyclic number.

It is not a de Polignac number, because 421302641 - 2¹⁸ = 421040497 is a prime.

It is not a weakly prime, because it can be changed into another prime (421302611) 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, 210651320 + 210651321.

It is an arithmetic number, because the mean of its divisors is an integer number (210651321).

Almost surely, 2^421302641 is an apocalyptic number.

It is an amenable number.

421302641 is a deficient number, since it is larger than the sum of its proper divisors (1).

421302641 is an equidigital number, since it uses as much as digits as its factorization.

421302641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 421302641 is about 20525.6581136879. The cubic root of 421302641 is about 749.6606707937.

Adding to 421302641 its reverse (146203124), we get a palindrome (567505765).

The spelling of 421302641 in words is "four hundred twenty-one million, three hundred two thousand, six hundred forty-one".