2612221 has 4 divisors (see below), whose sum is σ = 2635452. Its totient is φ = 2588992.

The previous prime is 2612209. The next prime is 2612243. The reversal of 2612221 is 1222162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222162 = 2 ⋅611081.

It can be written as a sum of positive squares in 2 ways, for example, as 16900 + 2595321 = 130^2 + 1611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2612221 - 2¹⁵ = 2579453 is a prime.

It is a Duffinian number.

2612221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2612195 and 2612204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2612201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11446 + ... + 11671.

It is an arithmetic number, because the mean of its divisors is an integer number (658863).

2^2612221 is an apocalyptic number.

It is an amenable number.

2612221 is a deficient number, since it is larger than the sum of its proper divisors (23231).

2612221 is a wasteful number, since it uses less digits than its factorization.

2612221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23230.

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

The square root of 2612221 is about 1616.2366782127. The cubic root of 2612221 is about 137.7219951128.

Adding to 2612221 its reverse (1222162), we get a palindrome (3834383).

The spelling of 2612221 in words is "two million, six hundred twelve thousand, two hundred twenty-one".