42855615 has 32 divisors (see below), whose sum is σ = 83116800. Its totient is φ = 20777760.

The previous prime is 42855581. The next prime is 42855661. The reversal of 42855615 is 51655824.

It is not a de Polignac number, because 42855615 - 2¹¹ = 42853567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42855615.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12945 + ... + 15914.

It is an arithmetic number, because the mean of its divisors is an integer number (2597400).

Almost surely, 2^42855615 is an apocalyptic number.

42855615 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42855615 is a deficient number, since it is larger than the sum of its proper divisors (40261185).

42855615 is a wasteful number, since it uses less digits than its factorization.

42855615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28884 (or 28878 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 42855615 is about 6546.4200140229. The cubic root of 42855615 is about 349.9472437490.

The spelling of 42855615 in words is "forty-two million, eight hundred fifty-five thousand, six hundred fifteen".