1275261307613 has 16 divisors (see below), whose sum is σ = 1310190151680. Its totient is φ = 1240915044096.

The previous prime is 1275261307597. The next prime is 1275261307769. The reversal of 1275261307613 is 3167031625721.

It is a cyclic number.

It is not a de Polignac number, because 1275261307613 - 2⁴ = 1275261307597 is a prime.

It is a super-2 number, since 2×1275261307613² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275261307813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1275281 + ... + 2043737.

It is an arithmetic number, because the mean of its divisors is an integer number (81886884480).

Almost surely, 2^{1275261307613} is an apocalyptic number.

It is an amenable number.

1275261307613 is a deficient number, since it is larger than the sum of its proper divisors (34928844067).

1275261307613 is a wasteful number, since it uses less digits than its factorization.

1275261307613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768836.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 1275261307613 in words is "one trillion, two hundred seventy-five billion, two hundred sixty-one million, three hundred seven thousand, six hundred thirteen".