42165511 has 8 divisors (see below), whose sum is σ = 42627200. Its totient is φ = 41706360.

The previous prime is 42165467. The next prime is 42165517. The reversal of 42165511 is 11556124.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42165511 - 2¹¹ = 42163463 is a prime.

It is a super-2 number, since 2×42165511² = 3555860635782242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42165517) 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, 60676 + ... + 61366.

It is an arithmetic number, because the mean of its divisors is an integer number (5328400).

Almost surely, 2^42165511 is an apocalyptic number.

42165511 is a deficient number, since it is larger than the sum of its proper divisors (461689).

42165511 is a wasteful number, since it uses less digits than its factorization.

42165511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269.

The product of its digits is 1200, while the sum is 25.

The square root of 42165511 is about 6493.4975937471. The cubic root of 42165511 is about 348.0586697005.

The spelling of 42165511 in words is "forty-two million, one hundred sixty-five thousand, five hundred eleven".