1306251256645 has 8 divisors (see below), whose sum is σ = 1578778498080. Its totient is φ = 1037483011920.

The previous prime is 1306251256589. The next prime is 1306251256691. The reversal of 1306251256645 is 5466521526031.

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

It is not a de Polignac number, because 1306251256645 - 2³⁹ = 756495442757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1306251256595 and 1306251256604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939748411 + ... + 939749800.

It is an arithmetic number, because the mean of its divisors is an integer number (197347312260).

Almost surely, 2^{1306251256645} is an apocalyptic number.

It is an amenable number.

1306251256645 is a deficient number, since it is larger than the sum of its proper divisors (272527241435).

1306251256645 is a wasteful number, since it uses less digits than its factorization.

1306251256645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879498355.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 1306251256645 in words is "one trillion, three hundred six billion, two hundred fifty-one million, two hundred fifty-six thousand, six hundred forty-five".