1321115423 has 8 divisors (see below), whose sum is σ = 1381764096. Its totient is φ = 1260734200.

The previous prime is 1321115363. The next prime is 1321115443. The reversal of 1321115423 is 3245111231.

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 1321115423 - 2⁸ = 1321115167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321115443) 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, 56723 + ... + 76548.

It is an arithmetic number, because the mean of its divisors is an integer number (172720512).

Almost surely, 2^1321115423 is an apocalyptic number.

1321115423 is a deficient number, since it is larger than the sum of its proper divisors (60648673).

1321115423 is a wasteful number, since it uses less digits than its factorization.

1321115423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133725.

The product of its digits is 720, while the sum is 23.

The square root of 1321115423 is about 36347.1515115009. The cubic root of 1321115423 is about 1097.2702073022.

Adding to 1321115423 its reverse (3245111231), we get a palindrome (4566226654).

The spelling of 1321115423 in words is "one billion, three hundred twenty-one million, one hundred fifteen thousand, four hundred twenty-three".