42320165 has 4 divisors (see below), whose sum is σ = 50784204. Its totient is φ = 33856128.

The previous prime is 42320143. The next prime is 42320203. The reversal of 42320165 is 56102324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32821441 + 9498724 = 5729^2 + 3082^2 .

It is a cyclic number.

It is not a de Polignac number, because 42320165 - 2¹⁸ = 42058021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42320165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4232012 + ... + 4232021.

It is an arithmetic number, because the mean of its divisors is an integer number (12696051).

Almost surely, 2^42320165 is an apocalyptic number.

It is an amenable number.

42320165 is a deficient number, since it is larger than the sum of its proper divisors (8464039).

42320165 is an equidigital number, since it uses as much as digits as its factorization.

42320165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8464038.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 42320165 is about 6505.3950687103. The cubic root of 42320165 is about 348.4836852116.

Adding to 42320165 its reverse (56102324), we get a palindrome (98422489).

The spelling of 42320165 in words is "forty-two million, three hundred twenty thousand, one hundred sixty-five".