1320225 has 24 divisors (see below), whose sum is σ = 2261760. Its totient is φ = 678720.

The previous prime is 1320211. The next prime is 1320247. The reversal of 1320225 is 5220231.

It is not a de Polignac number, because 1320225 - 2⁶ = 1320161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

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 23 ways as a sum of consecutive naturals, for example, 1872 + ... + 2478.

It is an arithmetic number, because the mean of its divisors is an integer number (94240).

2^1320225 is an apocalyptic number.

1320225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1320225 is a deficient number, since it is larger than the sum of its proper divisors (941535).

1320225 is a wasteful number, since it uses less digits than its factorization.

1320225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1320225 is about 1149.0104438168. The cubic root of 1320225 is about 109.7023634293.

Adding to 1320225 its reverse (5220231), we get a palindrome (6540456).

The spelling of 1320225 in words is "one million, three hundred twenty thousand, two hundred twenty-five".