1321055 has 4 divisors (see below), whose sum is σ = 1585272. Its totient is φ = 1056840.

The previous prime is 1321031. The next prime is 1321063. The reversal of 1321055 is 5501231.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1321055 - 2⁸ = 1320799 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 3 ways as a sum of consecutive naturals, for example, 132101 + ... + 132110.

It is an arithmetic number, because the mean of its divisors is an integer number (396318).

2^1321055 is an apocalyptic number.

1321055 is a deficient number, since it is larger than the sum of its proper divisors (264217).

1321055 is an equidigital number, since it uses as much as digits as its factorization.

1321055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264216.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1321055 is about 1149.3715674228. The cubic root of 1321055 is about 109.7253478668.

Adding to 1321055 its reverse (5501231), we get a palindrome (6822286).

The spelling of 1321055 in words is "one million, three hundred twenty-one thousand, fifty-five".