42408665 has 32 divisors (see below), whose sum is σ = 60238080. Its totient is φ = 28359936.

The previous prime is 42408649. The next prime is 42408677. The reversal of 42408665 is 56680424.

42408665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 42408665 - 2⁴ = 42408649 is a prime.

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, 27659 + ... + 29151.

It is an arithmetic number, because the mean of its divisors is an integer number (1882440).

Almost surely, 2^42408665 is an apocalyptic number.

It is an amenable number.

42408665 is a deficient number, since it is larger than the sum of its proper divisors (17829415).

42408665 is a wasteful number, since it uses less digits than its factorization.

42408665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 42408665 is about 6512.1935628481. The cubic root of 42408665 is about 348.7264326345.

The spelling of 42408665 in words is "forty-two million, four hundred eight thousand, six hundred sixty-five".