42057216 has 60 divisors (see below), whose sum is σ = 121393272. Its totient is φ = 14017536.

The previous prime is 42057181. The next prime is 42057233. The reversal of 42057216 is 61275024.

It is a self number, because there is not a number n which added to its sum of digits gives 42057216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45 + ... + 9171.

Almost surely, 2^42057216 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 42057216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60696636).

42057216 is an abundant number, since it is smaller than the sum of its proper divisors (79336056).

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

42057216 is an equidigital number, since it uses as much as digits as its factorization.

42057216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9151 (or 9132 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 42057216 is about 6485.1535062788. The cubic root of 42057216 is about 347.7604375810.

The spelling of 42057216 in words is "forty-two million, fifty-seven thousand, two hundred sixteen".