2115705 has 16 divisors (see below), whose sum is σ = 3458304. Its totient is φ = 1104000.

The previous prime is 2115703. The next prime is 2115713. The reversal of 2115705 is 5075112.

It is not a de Polignac number, because 2115705 - 2¹ = 2115703 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2115703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 796 + ... + 2205.

It is an arithmetic number, because the mean of its divisors is an integer number (216144).

2^2115705 is an apocalyptic number.

It is an amenable number.

2115705 is a deficient number, since it is larger than the sum of its proper divisors (1342599).

2115705 is a wasteful number, since it uses less digits than its factorization.

2115705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 2115705 is about 1454.5463210225. The cubic root of 2115705 is about 128.3763540855.

It can be divided in two parts, 211570 and 5, that added together give a triangular number (211575 = T₆₅₀).

The spelling of 2115705 in words is "two million, one hundred fifteen thousand, seven hundred five".