42236251 has 2 divisors, whose sum is σ = 42236252. Its totient is φ = 42236250.

The previous prime is 42236239. The next prime is 42236287. The reversal of 42236251 is 15263224.

42236251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42236251 - 2⁵ = 42236219 is a prime.

It is not a weakly prime, because it can be changed into another prime (42236231) 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, 21118125 + 21118126.

It is an arithmetic number, because the mean of its divisors is an integer number (21118126).

Almost surely, 2^42236251 is an apocalyptic number.

42236251 is a deficient number, since it is larger than the sum of its proper divisors (1).

42236251 is an equidigital number, since it uses as much as digits as its factorization.

42236251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 42236251 is about 6498.9422985591. The cubic root of 42236251 is about 348.2532039970.

Adding to 42236251 its reverse (15263224), we get a palindrome (57499475).

The spelling of 42236251 in words is "forty-two million, two hundred thirty-six thousand, two hundred fifty-one".