1320134243 has 8 divisors (see below), whose sum is σ = 1377895200. Its totient is φ = 1262403648.

The previous prime is 1320134209. The next prime is 1320134267. The reversal of 1320134243 is 3424310231.

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 1320134243 - 2¹⁰ = 1320133219 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 not an unprimeable number, because it can be changed into a prime (1320134203) 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, 165593 + ... + 173381.

It is an arithmetic number, because the mean of its divisors is an integer number (172236900).

Almost surely, 2^1320134243 is an apocalyptic number.

1320134243 is a deficient number, since it is larger than the sum of its proper divisors (57760957).

1320134243 is an equidigital number, since it uses as much as digits as its factorization.

1320134243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15181.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1320134243 is about 36333.6516606850. The cubic root of 1320134243 is about 1096.9984959374.

Adding to 1320134243 its reverse (3424310231), we get a palindrome (4744444474).

The spelling of 1320134243 in words is "one billion, three hundred twenty million, one hundred thirty-four thousand, two hundred forty-three".