1326221 has 12 divisors (see below), whose sum is σ = 1521492. Its totient is φ = 1148928.

The previous prime is 1326197. The next prime is 1326239. The reversal of 1326221 is 1226231.

It can be written as a sum of positive squares in 6 ways, for example, as 3721 + 1322500 = 61^2 + 1150^2 .

It is not a de Polignac number, because 1326221 - 2¹⁰ = 1325197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1326221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3581 + ... + 3933.

It is an arithmetic number, because the mean of its divisors is an integer number (126791).

2^1326221 is an apocalyptic number.

It is an amenable number.

1326221 is a deficient number, since it is larger than the sum of its proper divisors (195271).

1326221 is a wasteful number, since it uses less digits than its factorization.

1326221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 383 counting only the distinct ones).

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

The square root of 1326221 is about 1151.6166897019. The cubic root of 1326221 is about 109.8681892243.

The spelling of 1326221 in words is "one million, three hundred twenty-six thousand, two hundred twenty-one".