2162261 has 4 divisors (see below), whose sum is σ = 2165772. Its totient is φ = 2158752.

The previous prime is 2162249. The next prime is 2162263. The reversal of 2162261 is 1622612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1739761 + 422500 = 1319^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 2162261 - 2⁶ = 2162197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2162263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560 + ... + 2153.

It is an arithmetic number, because the mean of its divisors is an integer number (541443).

2^2162261 is an apocalyptic number.

It is an amenable number.

2162261 is a deficient number, since it is larger than the sum of its proper divisors (3511).

2162261 is an equidigital number, since it uses as much as digits as its factorization.

2162261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510.

The product of its digits is 288, while the sum is 20.

The square root of 2162261 is about 1470.4628523020. The cubic root of 2162261 is about 129.3111691628.

Adding to 2162261 its reverse (1622612), we get a palindrome (3784873).

The spelling of 2162261 in words is "two million, one hundred sixty-two thousand, two hundred sixty-one".