1306688506 has 8 divisors (see below), whose sum is σ = 1960431444. Its totient is φ = 653211360.

The previous prime is 1306688483. The next prime is 1306688521. The reversal of 1306688506 is 6058866031.

It can be written as a sum of positive squares in 2 ways, for example, as 920212225 + 386476281 = 30335^2 + 19659^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53665 + ... + 74116.

Almost surely, 2^1306688506 is an apocalyptic number.

1306688506 is a deficient number, since it is larger than the sum of its proper divisors (653742938).

1306688506 is a wasteful number, since it uses less digits than its factorization.

1306688506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132896.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1306688506 is about 36148.1466468199. The cubic root of 1306688506 is about 1093.2614226408.

The spelling of 1306688506 in words is "one billion, three hundred six million, six hundred eighty-eight thousand, five hundred six".