2611321 has 2 divisors, whose sum is σ = 2611322. Its totient is φ = 2611320.

The previous prime is 2611291. The next prime is 2611361. The reversal of 2611321 is 1231162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2496400 + 114921 = 1580^2 + 339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2611321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2611295 and 2611304.

It is not a weakly prime, because it can be changed into another prime (2611361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1305660 + 1305661.

It is an arithmetic number, because the mean of its divisors is an integer number (1305661).

2^2611321 is an apocalyptic number.

It is an amenable number.

2611321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2611321 is an equidigital number, since it uses as much as digits as its factorization.

2611321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 16.

The square root of 2611321 is about 1615.9582296582. The cubic root of 2611321 is about 137.7061766409.

Adding to 2611321 its reverse (1231162), we get a palindrome (3842483).

The spelling of 2611321 in words is "two million, six hundred eleven thousand, three hundred twenty-one".