42239965 has 8 divisors (see below), whose sum is σ = 51137208. Its totient is φ = 33492480.

The previous prime is 42239947. The next prime is 42239969. The reversal of 42239965 is 56993224.

42239965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 521284 + 41718681 = 722^2 + 6459^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42239965 - 2⁷ = 42239837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42239969) 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 in 7 ways as a sum of consecutive naturals, for example, 36816 + ... + 37945.

It is an arithmetic number, because the mean of its divisors is an integer number (6392151).

Almost surely, 2^42239965 is an apocalyptic number.

It is an amenable number.

42239965 is a deficient number, since it is larger than the sum of its proper divisors (8897243).

42239965 is a wasteful number, since it uses less digits than its factorization.

42239965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74879.

The product of its digits is 116640, while the sum is 40.

The square root of 42239965 is about 6499.2280310818. The cubic root of 42239965 is about 348.2634114567.

The spelling of 42239965 in words is "forty-two million, two hundred thirty-nine thousand, nine hundred sixty-five".