42045660 has 72 divisors (see below), whose sum is σ = 128768640. Its totient is φ = 11104128.

The previous prime is 42045659. The next prime is 42045667. The reversal of 42045660 is 6654024.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42045667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18549 + ... + 20691.

Almost surely, 2^42045660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42045660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64384320).

42045660 is an abundant number, since it is smaller than the sum of its proper divisors (86722980).

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

42045660 is a wasteful number, since it uses less digits than its factorization.

42045660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267 (or 2262 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 42045660 is about 6484.2624869757. The cubic root of 42045660 is about 347.7285834536.

Adding to 42045660 its reverse (6654024), we get a palindrome (48699684).

The spelling of 42045660 in words is "forty-two million, forty-five thousand, six hundred sixty".