2164257 has 6 divisors (see below), whose sum is σ = 3126162. Its totient is φ = 1442832.

The previous prime is 2164247. The next prime is 2164273. The reversal of 2164257 is 7524612.

It can be written as a sum of positive squares in only one way, i.e., 2005056 + 159201 = 1416^2 + 399^2 .

It is not a de Polignac number, because 2164257 - 2⁶ = 2164193 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 1 + 6⁶ + 4 + 2²¹ + 5⁵ + 7⁵ .

It is a self number, because there is not a number n which added to its sum of digits gives 2164257.

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 5 ways as a sum of consecutive naturals, for example, 120228 + ... + 120245.

It is an arithmetic number, because the mean of its divisors is an integer number (521027).

2^2164257 is an apocalyptic number.

It is an amenable number.

2164257 is a deficient number, since it is larger than the sum of its proper divisors (961905).

2164257 is a wasteful number, since it uses less digits than its factorization.

2164257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240479 (or 240476 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 2164257 is about 1471.1413936125. The cubic root of 2164257 is about 129.3509463088.

Adding to 2164257 its reverse (7524612), we get a palindrome (9688869).

The spelling of 2164257 in words is "two million, one hundred sixty-four thousand, two hundred fifty-seven".