2164401 has 14 divisors (see below), whose sum is σ = 3246210. Its totient is φ = 1442448.

The previous prime is 2164399. The next prime is 2164417. The reversal of 2164401 is 1044612.

2164401 is a `hidden beast` number, since 21 + 644 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 998001 = 1080^2 + 999^2 .

It is not a de Polignac number, because 2164401 - 2¹ = 2164399 is a prime.

2164401 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2164441) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 756 + ... + 2213.

2^2164401 is an apocalyptic number.

It is an amenable number.

2164401 is a deficient number, since it is larger than the sum of its proper divisors (1081809).

2164401 is an frugal number, since it uses more digits than its factorization.

2164401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987 (or 2972 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2164401 is about 1471.1903343891. The cubic root of 2164401 is about 129.3538150567.

The spelling of 2164401 in words is "two million, one hundred sixty-four thousand, four hundred one".