1306261134261 has 24 divisors (see below), whose sum is σ = 1892720394240. Its totient is φ = 868120916256.

The previous prime is 1306261134253. The next prime is 1306261134307. The reversal of 1306261134261 is 1624311626031.

1306261134261 is a `hidden beast` number, since 1 + 3 + 0 + 6 + 2 + 611 + 34 + 2 + 6 + 1 = 666.

It is not a de Polignac number, because 1306261134261 - 2³ = 1306261134253 is a prime.

It is a super-2 number, since 2×1306261134261² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306261134961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5831980 + ... + 6051818.

It is an arithmetic number, because the mean of its divisors is an integer number (78863349760).

Almost surely, 2^{1306261134261} is an apocalyptic number.

It is an amenable number.

1306261134261 is a deficient number, since it is larger than the sum of its proper divisors (586459259979).

1306261134261 is a wasteful number, since it uses less digits than its factorization.

1306261134261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221905 (or 221902 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 1306261134261 in words is "one trillion, three hundred six billion, two hundred sixty-one million, one hundred thirty-four thousand, two hundred sixty-one".