1320555 has 8 divisors (see below), whose sum is σ = 2112912. Its totient is φ = 704288.

The previous prime is 1320541. The next prime is 1320607. The reversal of 1320555 is 5550231.

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 1320555 - 2⁷ = 1320427 is a prime.

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, 44004 + ... + 44033.

It is an arithmetic number, because the mean of its divisors is an integer number (264114).

2^1320555 is an apocalyptic number.

1320555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1320555 is a deficient number, since it is larger than the sum of its proper divisors (792357).

1320555 is an equidigital number, since it uses as much as digits as its factorization.

1320555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88045.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 1320555 is about 1149.1540366722. The cubic root of 1320555 is about 109.7115029734.

Adding to 1320555 its reverse (5550231), we get a palindrome (6870786).

The spelling of 1320555 in words is "one million, three hundred twenty thousand, five hundred fifty-five".