1125684272681 has 2 divisors, whose sum is σ = 1125684272682. Its totient is φ = 1125684272680.

The previous prime is 1125684272659. The next prime is 1125684272689. The reversal of 1125684272681 is 1862724865211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1038605574400 + 87078698281 = 1019120^2 + 295091^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125684272681 - 2²² = 1125680078377 is a prime.

It is a super-2 number, since 2×1125684272681² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1125684272689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562842136340 + 562842136341.

It is an arithmetic number, because the mean of its divisors is an integer number (562842136341).

Almost surely, 2^{1125684272681} is an apocalyptic number.

It is an amenable number.

1125684272681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125684272681 is an equidigital number, since it uses as much as digits as its factorization.

1125684272681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2580480, while the sum is 53.

The spelling of 1125684272681 in words is "one trillion, one hundred twenty-five billion, six hundred eighty-four million, two hundred seventy-two thousand, six hundred eighty-one".