42665042 has 16 divisors (see below), whose sum is σ = 73249920. Its totient is φ = 18257568.

The previous prime is 42665041. The next prime is 42665057. The reversal of 42665042 is 24056624.

It is a junction number, because it is equal to n+sod(n) for n = 42664996 and 42665014.

It is not an unprimeable number, because it can be changed into a prime (42665041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9443 + ... + 13209.

It is an arithmetic number, because the mean of its divisors is an integer number (4578120).

Almost surely, 2^42665042 is an apocalyptic number.

42665042 is a deficient number, since it is larger than the sum of its proper divisors (30584878).

42665042 is a wasteful number, since it uses less digits than its factorization.

42665042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4585.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 42665042 is about 6531.8482836024. The cubic root of 42665042 is about 349.4277505974.

The spelling of 42665042 in words is "forty-two million, six hundred sixty-five thousand, forty-two".