1330561306 has 4 divisors (see below), whose sum is σ = 1995841962. Its totient is φ = 665280652.

The previous prime is 1330561259. The next prime is 1330561307. The reversal of 1330561306 is 6031650331.

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

It can be written as a sum of positive squares in only one way, i.e., 1307473281 + 23088025 = 36159^2 + 4805^2 .

It is not an unprimeable number, because it can be changed into a prime (1330561307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332640325 + ... + 332640328.

Almost surely, 2^1330561306 is an apocalyptic number.

1330561306 is a deficient number, since it is larger than the sum of its proper divisors (665280656).

1330561306 is an equidigital number, since it uses as much as digits as its factorization.

1330561306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665280655.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 1330561306 is about 36476.8598703342. The cubic root of 1330561306 is about 1099.8791343784.

The spelling of 1330561306 in words is "one billion, three hundred thirty million, five hundred sixty-one thousand, three hundred six".