42011660 has 24 divisors (see below), whose sum is σ = 92868720. Its totient is φ = 15920064.

The previous prime is 42011621. The next prime is 42011663. The reversal of 42011660 is 6611024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (42011663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54899 + ... + 55658.

It is an arithmetic number, because the mean of its divisors is an integer number (3869530).

Almost surely, 2^42011660 is an apocalyptic number.

It is an amenable number.

42011660 is an abundant number, since it is smaller than the sum of its proper divisors (50857060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42011660 is a wasteful number, since it uses less digits than its factorization.

42011660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110585 (or 110583 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 42011660 is about 6481.6402245111. The cubic root of 42011660 is about 347.6348285526.

Adding to 42011660 its reverse (6611024), we get a palindrome (48622684).

The spelling of 42011660 in words is "forty-two million, eleven thousand, six hundred sixty".