1306120664 has 8 divisors (see below), whose sum is σ = 2448976260. Its totient is φ = 653060328.

The previous prime is 1306120661. The next prime is 1306120679. The reversal of 1306120664 is 4660216031.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306120661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81632534 + ... + 81632549.

Almost surely, 2^1306120664 is an apocalyptic number.

It is an amenable number.

1306120664 is a deficient number, since it is larger than the sum of its proper divisors (1142855596).

1306120664 is a wasteful number, since it uses less digits than its factorization.

1306120664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163265089 (or 163265085 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1306120664 is about 36140.2914210719. The cubic root of 1306120664 is about 1093.1030350584.

Adding to 1306120664 its reverse (4660216031), we get a palindrome (5966336695).

The spelling of 1306120664 in words is "one billion, three hundred six million, one hundred twenty thousand, six hundred sixty-four".