1320404345 has 8 divisors (see below), whose sum is σ = 1706368776. Its totient is φ = 975067776.

The previous prime is 1320404339. The next prime is 1320404381. The reversal of 1320404345 is 5434040231.

It can be written as a sum of positive squares in 4 ways, for example, as 4963984 + 1315440361 = 2228^2 + 36269^2 .

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 1320404345 - 2²⁶ = 1253295481 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, 10156892 + ... + 10157021.

It is an arithmetic number, because the mean of its divisors is an integer number (213296097).

Almost surely, 2^1320404345 is an apocalyptic number.

It is an amenable number.

1320404345 is a deficient number, since it is larger than the sum of its proper divisors (385964431).

1320404345 is a wasteful number, since it uses less digits than its factorization.

1320404345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20313931.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 1320404345 is about 36337.3684380143. The cubic root of 1320404345 is about 1097.0733068348.

Adding to 1320404345 its reverse (5434040231), we get a palindrome (6754444576).

The spelling of 1320404345 in words is "one billion, three hundred twenty million, four hundred four thousand, three hundred forty-five".