1321355135 has 4 divisors (see below), whose sum is σ = 1585626168. Its totient is φ = 1057084104.

The previous prime is 1321355089. The next prime is 1321355153. The reversal of 1321355135 is 5315531231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1321355135 - 2¹² = 1321351039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321355098 and 1321355107.

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, 132135509 + ... + 132135518.

It is an arithmetic number, because the mean of its divisors is an integer number (396406542).

Almost surely, 2^1321355135 is an apocalyptic number.

1321355135 is a deficient number, since it is larger than the sum of its proper divisors (264271033).

1321355135 is an equidigital number, since it uses as much as digits as its factorization.

1321355135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264271032.

The product of its digits is 6750, while the sum is 29.

The square root of 1321355135 is about 36350.4488968156. The cubic root of 1321355135 is about 1097.3365686320.

Adding to 1321355135 its reverse (5315531231), we get a palindrome (6636886366).

The spelling of 1321355135 in words is "one billion, three hundred twenty-one million, three hundred fifty-five thousand, one hundred thirty-five".