1306720606 has 16 divisors (see below), whose sum is σ = 2098703520. Its totient is φ = 608016640.

The previous prime is 1306720603. The next prime is 1306720607. The reversal of 1306720606 is 6060276031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306720603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212890 + ... + 218941.

It is an arithmetic number, because the mean of its divisors is an integer number (131168970).

Almost surely, 2^1306720606 is an apocalyptic number.

1306720606 is a deficient number, since it is larger than the sum of its proper divisors (791982914).

1306720606 is a wasteful number, since it uses less digits than its factorization.

1306720606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431939.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 1306720606 is about 36148.5906502591. The cubic root of 1306720606 is about 1093.2703748903.

Adding to 1306720606 its reverse (6060276031), we get a palindrome (7366996637).

The spelling of 1306720606 in words is "one billion, three hundred six million, seven hundred twenty thousand, six hundred six".