1328560801 has 4 divisors (see below), whose sum is σ = 1328635204. Its totient is φ = 1328486400.

The previous prime is 1328560787. The next prime is 1328560817. The reversal of 1328560801 is 1080658231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1080658231 = 19 ⋅56876749.

It can be written as a sum of positive squares in 2 ways, for example, as 583270801 + 745290000 = 24151^2 + 27300^2 .

It is a 3-Lehmer number, since φ(1328560801) divides (1328560801-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1328560801 - 2¹¹ = 1328558753 is a prime.

It is a deceptive number, since it divides R_1328560800.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1328560841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7441 + ... + 52081.

It is an arithmetic number, because the mean of its divisors is an integer number (332158801).

Almost surely, 2^1328560801 is an apocalyptic number.

1328560801 is the 29761-st pentagonal number.

It is an amenable number.

1328560801 is a deficient number, since it is larger than the sum of its proper divisors (74403).

1328560801 is an equidigital number, since it uses as much as digits as its factorization.

1328560801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74402.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1328560801 is about 36449.4279927683. The cubic root of 1328560801 is about 1099.3276334575.

The spelling of 1328560801 in words is "one billion, three hundred twenty-eight million, five hundred sixty thousand, eight hundred one".