1279725875201 has 2 divisors, whose sum is σ = 1279725875202. Its totient is φ = 1279725875200.

The previous prime is 1279725875191. The next prime is 1279725875269. The reversal of 1279725875201 is 1025785279721.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 829645900801 + 450079974400 = 910849^2 + 670880^2 .

It is an emirp because it is prime and its reverse (1025785279721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1279725875201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1279725875501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639862937600 + 639862937601.

It is an arithmetic number, because the mean of its divisors is an integer number (639862937601).

Almost surely, 2^{1279725875201} is an apocalyptic number.

It is an amenable number.

1279725875201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279725875201 is an equidigital number, since it uses as much as digits as its factorization.

1279725875201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4939200, while the sum is 56.

The spelling of 1279725875201 in words is "one trillion, two hundred seventy-nine billion, seven hundred twenty-five million, eight hundred seventy-five thousand, two hundred one".