42618239 has 2 divisors, whose sum is σ = 42618240. Its totient is φ = 42618238.

The previous prime is 42618223. The next prime is 42618271. The reversal of 42618239 is 93281624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42618239 - 2⁴ = 42618223 is a prime.

It is a super-2 number, since 2×42618239² = 3632628590922242, which contains 22 as substring.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 42618199 and 42618208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42618299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21309119 + 21309120.

It is an arithmetic number, because the mean of its divisors is an integer number (21309120).

Almost surely, 2^42618239 is an apocalyptic number.

42618239 is a deficient number, since it is larger than the sum of its proper divisors (1).

42618239 is an equidigital number, since it uses as much as digits as its factorization.

42618239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 42618239 is about 6528.2646239257. The cubic root of 42618239 is about 349.2999312709.

The spelling of 42618239 in words is "forty-two million, six hundred eighteen thousand, two hundred thirty-nine".