42315820 has 12 divisors (see below), whose sum is σ = 88863264. Its totient is φ = 16926320.

The previous prime is 42315817. The next prime is 42315841. The reversal of 42315820 is 2851324.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1057876 + ... + 1057915.

It is an arithmetic number, because the mean of its divisors is an integer number (7405272).

Almost surely, 2^42315820 is an apocalyptic number.

It is an amenable number.

42315820 is an abundant number, since it is smaller than the sum of its proper divisors (46547444).

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

42315820 is a wasteful number, since it uses less digits than its factorization.

42315820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115800 (or 2115798 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 42315820 is about 6505.0611065539. The cubic root of 42315820 is about 348.4717585612.

The spelling of 42315820 in words is "forty-two million, three hundred fifteen thousand, eight hundred twenty".