1320430505 has 8 divisors (see below), whose sum is σ = 1584779712. Its totient is φ = 1056169008.

The previous prime is 1320430493. The next prime is 1320430513. The reversal of 1320430505 is 5050340231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320430505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17714 + ... + 54356.

It is an arithmetic number, because the mean of its divisors is an integer number (198097464).

Almost surely, 2^1320430505 is an apocalyptic number.

It is an amenable number.

1320430505 is a deficient number, since it is larger than the sum of its proper divisors (264349207).

1320430505 is an equidigital number, since it uses as much as digits as its factorization.

1320430505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43855.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 1320430505 is about 36337.7283962550. The cubic root of 1320430505 is about 1097.0805519003.

Adding to 1320430505 its reverse (5050340231), we get a palindrome (6370770736).

The spelling of 1320430505 in words is "one billion, three hundred twenty million, four hundred thirty thousand, five hundred five".