1272866682721 has 4 divisors (see below), whose sum is σ = 1275890119444. Its totient is φ = 1269843246000.

The previous prime is 1272866682713. The next prime is 1272866682739.

1272866682721 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65364592225 + 1207502090496 = 255665^2 + 1098864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272866682721 - 2³ = 1272866682713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272866688721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1511717730 + ... + 1511718571.

It is an arithmetic number, because the mean of its divisors is an integer number (318972529861).

Almost surely, 2^{1272866682721} is an apocalyptic number.

It is an amenable number.

1272866682721 is a deficient number, since it is larger than the sum of its proper divisors (3023436723).

1272866682721 is an equidigital number, since it uses as much as digits as its factorization.

1272866682721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3023436722.

The product of its digits is 10838016, while the sum is 58.

The spelling of 1272866682721 in words is "one trillion, two hundred seventy-two billion, eight hundred sixty-six million, six hundred eighty-two thousand, seven hundred twenty-one".