2164685 has 8 divisors (see below), whose sum is σ = 2668056. Its totient is φ = 1684800.

The previous prime is 2164681. The next prime is 2164739. The reversal of 2164685 is 5864612.

It can be written as a sum of positive squares in 4 ways, for example, as 896809 + 1267876 = 947^2 + 1126^2 .

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

It is not a de Polignac number, because 2164685 - 2² = 2164681 is a prime.

It is a super-2 number, since 2×2164685² = 9371722298450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164681) 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, 5666 + ... + 6035.

It is an arithmetic number, because the mean of its divisors is an integer number (333507).

2^2164685 is an apocalyptic number.

It is an amenable number.

2164685 is a deficient number, since it is larger than the sum of its proper divisors (503371).

2164685 is a wasteful number, since it uses less digits than its factorization.

2164685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11743.

The product of its digits is 11520, while the sum is 32.

The square root of 2164685 is about 1471.2868517050. The cubic root of 2164685 is about 129.3594724922.

The spelling of 2164685 in words is "two million, one hundred sixty-four thousand, six hundred eighty-five".