1522321 has 2 divisors, whose sum is σ = 1522322. Its totient is φ = 1522320.

The previous prime is 1522253. The next prime is 1522331. The reversal of 1522321 is 1232251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185921 + 336400 = 1089^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1522321 - 2⁹ = 1521809 is a prime.

It is a super-2 number, since 2×1522321² = 4634922454082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1522295 and 1522304.

It is not a weakly prime, because it can be changed into another prime (1522331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761160 + 761161.

It is an arithmetic number, because the mean of its divisors is an integer number (761161).

2^1522321 is an apocalyptic number.

It is an amenable number.

1522321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522321 is an equidigital number, since it uses as much as digits as its factorization.

1522321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 16.

The square root of 1522321 is about 1233.8237313328. The cubic root of 1522321 is about 115.0364345803.

Adding to 1522321 its reverse (1232251), we get a palindrome (2754572).

The spelling of 1522321 in words is "one million, five hundred twenty-two thousand, three hundred twenty-one".