42855860 has 12 divisors (see below), whose sum is σ = 89997348. Its totient is φ = 17142336.

The previous prime is 42855859. The next prime is 42855863. The reversal of 42855860 is 6855824.

It can be written as a sum of positive squares in 2 ways, for example, as 21270544 + 21585316 = 4612^2 + 4646^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42855863) 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, 1071377 + ... + 1071416.

It is an arithmetic number, because the mean of its divisors is an integer number (7499779).

Almost surely, 2^42855860 is an apocalyptic number.

It is an amenable number.

42855860 is an abundant number, since it is smaller than the sum of its proper divisors (47141488).

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

42855860 is a wasteful number, since it uses less digits than its factorization.

42855860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142802 (or 2142800 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 42855860 is about 6546.4387265138. The cubic root of 42855860 is about 349.9479106154.

The spelling of 42855860 in words is "forty-two million, eight hundred fifty-five thousand, eight hundred sixty".