42239233 has 2 divisors, whose sum is σ = 42239234. Its totient is φ = 42239232.

The previous prime is 42239231. The next prime is 42239273. The reversal of 42239233 is 33293224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42211009 + 28224 = 6497^2 + 168^2 .

It is a cyclic number.

It is not a de Polignac number, because 42239233 - 2¹ = 42239231 is a prime.

Together with 42239231, it forms a pair of twin primes.

It is equal to p_2561257 and since 42239233 and 2561257 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42239231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21119616 + 21119617.

It is an arithmetic number, because the mean of its divisors is an integer number (21119617).

Almost surely, 2^42239233 is an apocalyptic number.

It is an amenable number.

42239233 is a deficient number, since it is larger than the sum of its proper divisors (1).

42239233 is an equidigital number, since it uses as much as digits as its factorization.

42239233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 28.

The square root of 42239233 is about 6499.1717164574. The cubic root of 42239233 is about 348.2613996946.

It can be divided in two parts, 4223 and 9233, that added together give a square (13456 = 116²).

The spelling of 42239233 in words is "forty-two million, two hundred thirty-nine thousand, two hundred thirty-three".