1301221 has 2 divisors, whose sum is σ = 1301222. Its totient is φ = 1301220.

The previous prime is 1301219. The next prime is 1301233. The reversal of 1301221 is 1221031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1288225 + 12996 = 1135^2 + 114^2 .

It is a cyclic number.

It is not a de Polignac number, because 1301221 - 2¹ = 1301219 is a prime.

Together with 1301219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1301198 and 1301207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301281) 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, 650610 + 650611.

It is an arithmetic number, because the mean of its divisors is an integer number (650611).

2^1301221 is an apocalyptic number.

It is an amenable number.

1301221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301221 is an equidigital number, since it uses as much as digits as its factorization.

1301221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1301221 is about 1140.7107433526. The cubic root of 1301221 is about 109.1734466067.

Adding to 1301221 its reverse (1221031), we get a palindrome (2522252).

The spelling of 1301221 in words is "one million, three hundred one thousand, two hundred twenty-one".