42975239 has 2 divisors, whose sum is σ = 42975240. Its totient is φ = 42975238.

The previous prime is 42975227. The next prime is 42975253. The reversal of 42975239 is 93257924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42975239 - 2⁴ = 42975223 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42975196 and 42975205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42935239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21487619 + 21487620.

It is an arithmetic number, because the mean of its divisors is an integer number (21487620).

Almost surely, 2^42975239 is an apocalyptic number.

42975239 is a deficient number, since it is larger than the sum of its proper divisors (1).

42975239 is an equidigital number, since it uses as much as digits as its factorization.

42975239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 42975239 is about 6555.5502438773. The cubic root of 42975239 is about 350.2725468948.

The spelling of 42975239 in words is "forty-two million, nine hundred seventy-five thousand, two hundred thirty-nine".