42257856 has 56 divisors (see below), whose sum is σ = 113009680. Its totient is φ = 13934592.

The previous prime is 42257837. The next prime is 42257857. The reversal of 42257856 is 65875224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42257857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17490 + ... + 19758.

It is an arithmetic number, because the mean of its divisors is an integer number (2018030).

Almost surely, 2^42257856 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 42257856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56504840).

42257856 is an abundant number, since it is smaller than the sum of its proper divisors (70751824).

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

42257856 is a wasteful number, since it uses less digits than its factorization.

42257856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381 (or 2371 counting only the distinct ones).

The product of its digits is 134400, while the sum is 39.

The square root of 42257856 is about 6500.6042796036. The cubic root of 42257856 is about 348.3125742279.

The spelling of 42257856 in words is "forty-two million, two hundred fifty-seven thousand, eight hundred fifty-six".