421602241 has 2 divisors, whose sum is σ = 421602242. Its totient is φ = 421602240.

The previous prime is 421602127. The next prime is 421602277. The reversal of 421602241 is 142206124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399840016 + 21762225 = 19996^2 + 4665^2 .

It is a cyclic number.

It is not a de Polignac number, because 421602241 - 2⁷ = 421602113 is a prime.

It is a Chen prime.

It is equal to p_22425232 and since 421602241 and 22425232 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (421602341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210801120 + 210801121.

It is an arithmetic number, because the mean of its divisors is an integer number (210801121).

Almost surely, 2^421602241 is an apocalyptic number.

It is an amenable number.

421602241 is a deficient number, since it is larger than the sum of its proper divisors (1).

421602241 is an equidigital number, since it uses as much as digits as its factorization.

421602241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 421602241 is about 20532.9549992202. The cubic root of 421602241 is about 749.8383301900.

Adding to 421602241 its reverse (142206124), we get a palindrome (563808365).

The spelling of 421602241 in words is "four hundred twenty-one million, six hundred two thousand, two hundred forty-one".