42665860 has 12 divisors (see below), whose sum is σ = 89598348. Its totient is φ = 17066336.

The previous prime is 42665807. The next prime is 42665867. The reversal of 42665860 is 6856624.

It can be written as a sum of positive squares in 2 ways, for example, as 13957696 + 28708164 = 3736^2 + 5358^2 .

It is not an unprimeable number, because it can be changed into a prime (42665867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066627 + ... + 1066666.

It is an arithmetic number, because the mean of its divisors is an integer number (7466529).

Almost surely, 2^42665860 is an apocalyptic number.

It is an amenable number.

42665860 is an abundant number, since it is smaller than the sum of its proper divisors (46932488).

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

42665860 is a wasteful number, since it uses less digits than its factorization.

42665860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133302 (or 2133300 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 42665860 is about 6531.9108995760. The cubic root of 42665860 is about 349.4299837299.

The spelling of 42665860 in words is "forty-two million, six hundred sixty-five thousand, eight hundred sixty".