1321225 has 12 divisors (see below), whose sum is σ = 1679580. Its totient is φ = 1030400.

The previous prime is 1321219. The next prime is 1321247. The reversal of 1321225 is 5221231.

It can be written as a sum of positive squares in 6 ways, for example, as 84681 + 1236544 = 291^2 + 1112^2 .

It is not a de Polignac number, because 1321225 - 2⁵ = 1321193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321199 and 1321208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 381 + ... + 1669.

It is an arithmetic number, because the mean of its divisors is an integer number (139965).

2^1321225 is an apocalyptic number.

It is an amenable number.

1321225 is a deficient number, since it is larger than the sum of its proper divisors (358355).

1321225 is a wasteful number, since it uses less digits than its factorization.

1321225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340 (or 1335 counting only the distinct ones).

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

The square root of 1321225 is about 1149.4455185001. The cubic root of 1321225 is about 109.7300543348.

Adding to 1321225 its reverse (5221231), we get a palindrome (6542456).

The spelling of 1321225 in words is "one million, three hundred twenty-one thousand, two hundred twenty-five".