1320205 has 8 divisors (see below), whose sum is σ = 1606392. Its totient is φ = 1041408.

The previous prime is 1320199. The next prime is 1320211. The reversal of 1320205 is 5020231.

It is an interprime number because it is at equal distance from previous prime (1320199) and next prime (1320211).

It can be written as a sum of positive squares in 4 ways, for example, as 4 + 1320201 = 2^2 + 1149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1320205 - 2⁵ = 1320173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444 + ... + 2173.

It is an arithmetic number, because the mean of its divisors is an integer number (200799).

2^1320205 is an apocalyptic number.

It is an amenable number.

1320205 is a deficient number, since it is larger than the sum of its proper divisors (286187).

1320205 is an equidigital number, since it uses as much as digits as its factorization.

1320205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3695.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 1320205 is about 1149.0017406427. The cubic root of 1320205 is about 109.7018094686.

Adding to 1320205 its reverse (5020231), we get a palindrome (6340436).

The spelling of 1320205 in words is "one million, three hundred twenty thousand, two hundred five".