3221261 has 2 divisors, whose sum is σ = 3221262. Its totient is φ = 3221260.

The previous prime is 3221243. The next prime is 3221269. The reversal of 3221261 is 1621223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3204100 + 17161 = 1790^2 + 131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3221261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3221269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610630 + 1610631.

It is an arithmetic number, because the mean of its divisors is an integer number (1610631).

Almost surely, 2^3221261 is an apocalyptic number.

It is an amenable number.

3221261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221261 is an equidigital number, since it uses as much as digits as its factorization.

3221261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 3221261 is about 1794.7871740126. The cubic root of 3221261 is about 147.6868989586.

Adding to 3221261 its reverse (1621223), we get a palindrome (4842484).

The spelling of 3221261 in words is "three million, two hundred twenty-one thousand, two hundred sixty-one".