42665056 has 48 divisors (see below), whose sum is σ = 97251840. Its totient is φ = 18046080.

The previous prime is 42665041. The next prime is 42665057. The reversal of 42665056 is 65056624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42665057) 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, 16491 + ... + 18901.

It is an arithmetic number, because the mean of its divisors is an integer number (2026080).

Almost surely, 2^42665056 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 42665056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48625920).

42665056 is an abundant number, since it is smaller than the sum of its proper divisors (54586784).

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

42665056 is a wasteful number, since it uses less digits than its factorization.

42665056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507 (or 2499 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 42665056 is about 6531.8493552745. The cubic root of 42665056 is about 349.4277888175.

The spelling of 42665056 in words is "forty-two million, six hundred sixty-five thousand, fifty-six".