64243241 has 2 divisors, whose sum is σ = 64243242. Its totient is φ = 64243240.

The previous prime is 64243229. The next prime is 64243243. The reversal of 64243241 is 14234246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64080025 + 163216 = 8005^2 + 404^2 .

It is a cyclic number.

It is not a de Polignac number, because 64243241 - 2⁶ = 64243177 is a prime.

Together with 64243243, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64243241.

It is not a weakly prime, because it can be changed into another prime (64243243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32121620 + 32121621.

It is an arithmetic number, because the mean of its divisors is an integer number (32121621).

Almost surely, 2^64243241 is an apocalyptic number.

It is an amenable number.

64243241 is a deficient number, since it is larger than the sum of its proper divisors (1).

64243241 is an equidigital number, since it uses as much as digits as its factorization.

64243241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 26.

The square root of 64243241 is about 8015.1881450157. The cubic root of 64243241 is about 400.5061114413.

Adding to 64243241 its reverse (14234246), we get a palindrome (78477487).

The spelling of 64243241 in words is "sixty-four million, two hundred forty-three thousand, two hundred forty-one".