2117505 has 16 divisors (see below), whose sum is σ = 3648960. Its totient is φ = 1042368.

The previous prime is 2117501. The next prime is 2117513. The reversal of 2117505 is 5057112.

It is not a de Polignac number, because 2117505 - 2² = 2117501 is a prime.

2117505 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2117501) 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, 5235 + ... + 5624.

It is an arithmetic number, because the mean of its divisors is an integer number (228060).

2^2117505 is an apocalyptic number.

It is an amenable number.

2117505 is a deficient number, since it is larger than the sum of its proper divisors (1531455).

2117505 is a wasteful number, since it uses less digits than its factorization.

2117505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10880.

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

The square root of 2117505 is about 1455.1649391048. The cubic root of 2117505 is about 128.4127504540.

The spelling of 2117505 in words is "two million, one hundred seventeen thousand, five hundred five".