2164287 has 8 divisors (see below), whose sum is σ = 3055536. Its totient is φ = 1357952.

The previous prime is 2164273. The next prime is 2164291. The reversal of 2164287 is 7824612.

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 2164287 - 2⁶ = 2164223 is a prime.

2164287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164247) 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, 21168 + ... + 21269.

It is an arithmetic number, because the mean of its divisors is an integer number (381942).

2^2164287 is an apocalyptic number.

2164287 is a deficient number, since it is larger than the sum of its proper divisors (891249).

2164287 is a wasteful number, since it uses less digits than its factorization.

2164287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42457.

The product of its digits is 5376, while the sum is 30.

The square root of 2164287 is about 1471.1515897419. The cubic root of 2164287 is about 129.3515439751.

Adding to 2164287 its reverse (7824612), we get a palindrome (9988899).

The spelling of 2164287 in words is "two million, one hundred sixty-four thousand, two hundred eighty-seven".