2164505 has 8 divisors (see below), whose sum is σ = 2968512. Its totient is φ = 1484208.

The previous prime is 2164501. The next prime is 2164511. The reversal of 2164505 is 5054612.

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 2164505 - 2² = 2164501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2164501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30887 + ... + 30956.

It is an arithmetic number, because the mean of its divisors is an integer number (371064).

2^2164505 is an apocalyptic number.

It is an amenable number.

2164505 is a deficient number, since it is larger than the sum of its proper divisors (804007).

2164505 is an equidigital number, since it uses as much as digits as its factorization.

2164505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61855.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2164505 is about 1471.2256794931. The cubic root of 2164505 is about 129.3558868511.

The spelling of 2164505 in words is "two million, one hundred sixty-four thousand, five hundred five".