42243241 has 2 divisors, whose sum is σ = 42243242. Its totient is φ = 42243240.

The previous prime is 42243239. The next prime is 42243247. The reversal of 42243241 is 14234224.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28847641 + 13395600 = 5371^2 + 3660^2 .

It is a cyclic number.

It is not a de Polignac number, because 42243241 - 2¹ = 42243239 is a prime.

Together with 42243239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42243247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121620 + 21121621.

It is an arithmetic number, because the mean of its divisors is an integer number (21121621).

Almost surely, 2^42243241 is an apocalyptic number.

It is an amenable number.

42243241 is a deficient number, since it is larger than the sum of its proper divisors (1).

42243241 is an equidigital number, since it uses as much as digits as its factorization.

42243241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 22.

The square root of 42243241 is about 6499.4800561276. The cubic root of 42243241 is about 348.2724146321.

Adding to 42243241 its reverse (14234224), we get a palindrome (56477465).

The spelling of 42243241 in words is "forty-two million, two hundred forty-three thousand, two hundred forty-one".