1329906241 has 4 divisors (see below), whose sum is σ = 1332978052. Its totient is φ = 1326834432.

The previous prime is 1329906239. The next prime is 1329906251. The reversal of 1329906241 is 1426099231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55130625 + 1274775616 = 7425^2 + 35704^2 .

It is a cyclic number.

It is not a de Polignac number, because 1329906241 - 2¹ = 1329906239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1329906241.

It is not an unprimeable number, because it can be changed into a prime (1329906211) 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, 1535256 + ... + 1536121.

It is an arithmetic number, because the mean of its divisors is an integer number (333244513).

Almost surely, 2^1329906241 is an apocalyptic number.

It is an amenable number.

1329906241 is a deficient number, since it is larger than the sum of its proper divisors (3071811).

1329906241 is an equidigital number, since it uses as much as digits as its factorization.

1329906241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071810.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 1329906241 is about 36467.8795791584. The cubic root of 1329906241 is about 1099.6986064082.

The spelling of 1329906241 in words is "one billion, three hundred twenty-nine million, nine hundred six thousand, two hundred forty-one".