1321350503 has 8 divisors (see below), whose sum is σ = 1444368000. Its totient is φ = 1198815480.

The previous prime is 1321350431. The next prime is 1321350509. The reversal of 1321350503 is 3050531231.

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 1321350503 - 2²⁸ = 1052915047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321350509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114875 + ... + 125852.

It is an arithmetic number, because the mean of its divisors is an integer number (180546000).

Almost surely, 2^1321350503 is an apocalyptic number.

1321350503 is a deficient number, since it is larger than the sum of its proper divisors (123017497).

1321350503 is a wasteful number, since it uses less digits than its factorization.

1321350503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241237.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 1321350503 is about 36350.3851836538. The cubic root of 1321350503 is about 1097.3352863956.

Adding to 1321350503 its reverse (3050531231), we get a palindrome (4371881734).

The spelling of 1321350503 in words is "one billion, three hundred twenty-one million, three hundred fifty thousand, five hundred three".