2015855 has 8 divisors (see below), whose sum is σ = 2464992. Its totient is φ = 1582048.

The previous prime is 2015851. The next prime is 2015861. The reversal of 2015855 is 5585102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2015855 - 2² = 2015851 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3539 + ... + 4068.

It is an arithmetic number, because the mean of its divisors is an integer number (308124).

2^2015855 is an apocalyptic number.

2015855 is a deficient number, since it is larger than the sum of its proper divisors (449137).

2015855 is an equidigital number, since it uses as much as digits as its factorization.

2015855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7665.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 2015855 is about 1419.8080856228. The cubic root of 2015855 is about 126.3241632028.

The spelling of 2015855 in words is "two million, fifteen thousand, eight hundred fifty-five".