42626239 has 2 divisors, whose sum is σ = 42626240. Its totient is φ = 42626238.

The previous prime is 42626237. The next prime is 42626263. The reversal of 42626239 is 93262624.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42626239 - 2¹ = 42626237 is a prime.

Together with 42626237, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42626237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21313119 + 21313120.

It is an arithmetic number, because the mean of its divisors is an integer number (21313120).

Almost surely, 2^42626239 is an apocalyptic number.

42626239 is a deficient number, since it is larger than the sum of its proper divisors (1).

42626239 is an equidigital number, since it uses as much as digits as its factorization.

42626239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 42626239 is about 6528.8773154349. The cubic root of 42626239 is about 349.3217859563.

It can be divided in two parts, 4262 and 6239, that added together give a palindrome (10501).

The spelling of 42626239 in words is "forty-two million, six hundred twenty-six thousand, two hundred thirty-nine".