1320430605 has 32 divisors (see below), whose sum is σ = 2318150016. Its totient is φ = 637787904.

The previous prime is 1320430567. The next prime is 1320430607. The reversal of 1320430605 is 5060340231.

It is a happy number.

It is not a de Polignac number, because 1320430605 - 2⁹ = 1320430093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320430607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53547 + ... + 74216.

It is an arithmetic number, because the mean of its divisors is an integer number (72442188).

Almost surely, 2^1320430605 is an apocalyptic number.

1320430605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1320430605 is a deficient number, since it is larger than the sum of its proper divisors (997719411).

1320430605 is a wasteful number, since it uses less digits than its factorization.

1320430605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127837.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1320430605 is about 36337.7297722354. The cubic root of 1320430605 is about 1097.0805795953.

Adding to 1320430605 its reverse (5060340231), we get a palindrome (6380770836).

The spelling of 1320430605 in words is "one billion, three hundred twenty million, four hundred thirty thousand, six hundred five".