42087216 has 20 divisors (see below), whose sum is σ = 108725432. Its totient is φ = 14029056.

The previous prime is 42087211. The next prime is 42087251. The reversal of 42087216 is 61278024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42087211) 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, 438361 + ... + 438456.

Almost surely, 2^42087216 is an apocalyptic number.

It is an amenable number.

42087216 is an abundant number, since it is smaller than the sum of its proper divisors (66638216).

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

42087216 is a wasteful number, since it uses less digits than its factorization.

42087216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876828 (or 876822 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 42087216 is about 6487.4660692754. The cubic root of 42087216 is about 347.8431053883.

The spelling of 42087216 in words is "forty-two million, eighty-seven thousand, two hundred sixteen".