42865056 has 108 divisors (see below), whose sum is σ = 132512562. Its totient is φ = 13065984.

The previous prime is 42865001. The next prime is 42865061. The reversal of 42865056 is 65056824.

It can be written as a sum of positive squares in only one way, i.e., 41216400 + 1648656 = 6420^2 + 1284^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 42865056.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 400555 + ... + 400661.

Almost surely, 2^42865056 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 42865056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66256281).

42865056 is an abundant number, since it is smaller than the sum of its proper divisors (89647506).

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

42865056 is a wasteful number, since it uses less digits than its factorization.

42865056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 42865056 is about 6547.1410554531. The cubic root of 42865056 is about 349.9729394044.

The spelling of 42865056 in words is "forty-two million, eight hundred sixty-five thousand, fifty-six".