42199665 has 32 divisors (see below), whose sum is σ = 71470080. Its totient is φ = 21203136.

The previous prime is 42199639. The next prime is 42199679. The reversal of 42199665 is 56699124.

It is a happy number.

42199665 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 42199665 - 2⁶ = 42199601 is a prime.

It is a super-2 number, since 2×42199665² = 3561623452224450, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 74674 + ... + 75236.

It is an arithmetic number, because the mean of its divisors is an integer number (2233440).

Almost surely, 2^42199665 is an apocalyptic number.

It is an amenable number.

42199665 is a deficient number, since it is larger than the sum of its proper divisors (29270415).

42199665 is a wasteful number, since it uses less digits than its factorization.

42199665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853.

The product of its digits is 116640, while the sum is 42.

The square root of 42199665 is about 6496.1269230211. The cubic root of 42199665 is about 348.1526200035.

The spelling of 42199665 in words is "forty-two million, one hundred ninety-nine thousand, six hundred sixty-five".