42070165 has 8 divisors (see below), whose sum is σ = 50695128. Its totient is φ = 33515520.

The previous prime is 42070163. The next prime is 42070169. The reversal of 42070165 is 56107024.

It can be written as a sum of positive squares in 4 ways, for example, as 7800849 + 34269316 = 2793^2 + 5854^2 .

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

It is not a de Polignac number, because 42070165 - 2¹ = 42070163 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 (42070163) 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 in 7 ways as a sum of consecutive naturals, for example, 16252 + ... + 18661.

It is an arithmetic number, because the mean of its divisors is an integer number (6336891).

Almost surely, 2^42070165 is an apocalyptic number.

It is an amenable number.

42070165 is a deficient number, since it is larger than the sum of its proper divisors (8624963).

42070165 is a wasteful number, since it uses less digits than its factorization.

42070165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35159.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 42070165 is about 6486.1517866914. The cubic root of 42070165 is about 347.7961245828.

Adding to 42070165 its reverse (56107024), we get a palindrome (98177189).

The spelling of 42070165 in words is "forty-two million, seventy thousand, one hundred sixty-five".