2115105 has 24 divisors (see below), whose sum is σ = 3511872. Its totient is φ = 1086912.

The previous prime is 2115101. The next prime is 2115107. The reversal of 2115105 is 5015112.

It is not a de Polignac number, because 2115105 - 2² = 2115101 is a prime.

It is a super-2 number, since 2×2115105² = 8947338322050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (2115101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20484 + ... + 20586.

It is an arithmetic number, because the mean of its divisors is an integer number (146328).

2^2115105 is an apocalyptic number.

It is an amenable number.

2115105 is a deficient number, since it is larger than the sum of its proper divisors (1396767).

2115105 is a wasteful number, since it uses less digits than its factorization.

2115105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 2115105 is about 1454.3400565205. The cubic root of 2115105 is about 128.3642173754.

The spelling of 2115105 in words is "two million, one hundred fifteen thousand, one hundred five".