42520086 has 64 divisors (see below), whose sum is σ = 108725760. Its totient is φ = 12065760.

The previous prime is 42520063. The next prime is 42520097. The reversal of 42520086 is 68002524.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74181 + ... + 74751.

It is an arithmetic number, because the mean of its divisors is an integer number (1698840).

Almost surely, 2^42520086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42520086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54362880).

42520086 is an abundant number, since it is smaller than the sum of its proper divisors (66205674).

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

42520086 is a wasteful number, since it uses less digits than its factorization.

42520086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 42520086 is about 6520.7427491046. The cubic root of 42520086 is about 349.0315705028.

The spelling of 42520086 in words is "forty-two million, five hundred twenty thousand, eighty-six".