42261165 has 24 divisors (see below), whose sum is σ = 73446048. Its totient is φ = 22479840.

The previous prime is 42261157. The next prime is 42261181. The reversal of 42261165 is 56116224.

42261165 is a `hidden beast` number, since 42 + 2 + 611 + 6 + 5 = 666.

42261165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42261165 - 2³ = 42261157 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 20010 + ... + 22020.

It is an arithmetic number, because the mean of its divisors is an integer number (3060252).

Almost surely, 2^42261165 is an apocalyptic number.

42261165 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42261165 is a deficient number, since it is larger than the sum of its proper divisors (31184883).

42261165 is a wasteful number, since it uses less digits than its factorization.

42261165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489 (or 2486 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 42261165 is about 6500.8587894216. The cubic root of 42261165 is about 348.3216655255.

Adding to 42261165 its reverse (56116224), we get a palindrome (98377389).

The spelling of 42261165 in words is "forty-two million, two hundred sixty-one thousand, one hundred sixty-five".