2221261 has 4 divisors (see below), whose sum is σ = 2538592. Its totient is φ = 1903932.

The previous prime is 2221259. The next prime is 2221273. The reversal of 2221261 is 1621222.

2221261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2221261 - 2¹ = 2221259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158655 + ... + 158668.

It is an arithmetic number, because the mean of its divisors is an integer number (634648).

2^2221261 is an apocalyptic number.

It is an amenable number.

2221261 is a deficient number, since it is larger than the sum of its proper divisors (317331).

2221261 is an equidigital number, since it uses as much as digits as its factorization.

2221261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317330.

The product of its digits is 96, while the sum is 16.

The square root of 2221261 is about 1490.3895463938. The cubic root of 2221261 is about 130.4767700366.

Adding to 2221261 its reverse (1621222), we get a palindrome (3842483).

The spelling of 2221261 in words is "two million, two hundred twenty-one thousand, two hundred sixty-one".