42421686 has 12 divisors (see below), whose sum is σ = 84875292. Its totient is φ = 14135244.

The previous prime is 42421667. The next prime is 42421703. The reversal of 42421686 is 68612424.

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, 14625 + ... + 17283.

It is an arithmetic number, because the mean of its divisors is an integer number (7072941).

Almost surely, 2^42421686 is an apocalyptic number.

42421686 is an abundant number, since it is smaller than the sum of its proper divisors (42453606).

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

42421686 is an frugal number, since it uses more digits than its factorization.

42421686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5323 (or 2664 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 42421686 is about 6513.1932260605. The cubic root of 42421686 is about 348.7621195413.

The spelling of 42421686 in words is "forty-two million, four hundred twenty-one thousand, six hundred eighty-six".