42106665 has 8 divisors (see below), whose sum is σ = 67370688. Its totient is φ = 22456880.

The previous prime is 42106663. The next prime is 42106681. The reversal of 42106665 is 56660124.

42106665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42106665 - 2¹ = 42106663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42106663) 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, 1403541 + ... + 1403570.

It is an arithmetic number, because the mean of its divisors is an integer number (8421336).

Almost surely, 2^42106665 is an apocalyptic number.

It is an amenable number.

42106665 is a deficient number, since it is larger than the sum of its proper divisors (25264023).

42106665 is a wasteful number, since it uses less digits than its factorization.

42106665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807119.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 42106665 is about 6488.9648635202. The cubic root of 42106665 is about 347.8966779405.

Adding to 42106665 its reverse (56660124), we get a palindrome (98766789).

The spelling of 42106665 in words is "forty-two million, one hundred six thousand, six hundred sixty-five".