42417251 has 2 divisors, whose sum is σ = 42417252. Its totient is φ = 42417250.

The previous prime is 42417229. The next prime is 42417337. The reversal of 42417251 is 15271424.

42417251 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 42417251 - 2¹⁸ = 42155107 is a prime.

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 42417251.

It is not a weakly prime, because it can be changed into another prime (42411251) 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, 21208625 + 21208626.

It is an arithmetic number, because the mean of its divisors is an integer number (21208626).

Almost surely, 2^42417251 is an apocalyptic number.

42417251 is a deficient number, since it is larger than the sum of its proper divisors (1).

42417251 is an equidigital number, since it uses as much as digits as its factorization.

42417251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 26.

The square root of 42417251 is about 6512.8527543619. The cubic root of 42417251 is about 348.7499652711.

Adding to 42417251 its reverse (15271424), we get a palindrome (57688675).

The spelling of 42417251 in words is "forty-two million, four hundred seventeen thousand, two hundred fifty-one".