1256875701241 has 2 divisors, whose sum is σ = 1256875701242. Its totient is φ = 1256875701240.

The previous prime is 1256875701227. The next prime is 1256875701371. The reversal of 1256875701241 is 1421075786521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1256685840400 + 189860841 = 1121020^2 + 13779^2 .

It is an emirp because it is prime and its reverse (1421075786521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1256875701241 - 2¹¹ = 1256875699193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1256875701041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628437850620 + 628437850621.

It is an arithmetic number, because the mean of its divisors is an integer number (628437850621).

Almost surely, 2^{1256875701241} is an apocalyptic number.

It is an amenable number.

1256875701241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256875701241 is an equidigital number, since it uses as much as digits as its factorization.

1256875701241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 1256875701241 in words is "one trillion, two hundred fifty-six billion, eight hundred seventy-five million, seven hundred one thousand, two hundred forty-one".