2164261 has 4 divisors (see below), whose sum is σ = 2361024. Its totient is φ = 1967500.

The previous prime is 2164247. The next prime is 2164273. The reversal of 2164261 is 1624612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2164261 - 2⁵ = 2164229 is a prime.

It is a super-2 number, since 2×2164261² = 9368051352242, 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 (2164291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98365 + ... + 98386.

It is an arithmetic number, because the mean of its divisors is an integer number (590256).

2^2164261 is an apocalyptic number.

It is an amenable number.

2164261 is a deficient number, since it is larger than the sum of its proper divisors (196763).

2164261 is a wasteful number, since it uses less digits than its factorization.

2164261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196762.

The product of its digits is 576, while the sum is 22.

The square root of 2164261 is about 1471.1427531005. The cubic root of 2164261 is about 129.3510259980.

Adding to 2164261 its reverse (1624612), we get a palindrome (3788873).

The spelling of 2164261 in words is "two million, one hundred sixty-four thousand, two hundred sixty-one".