1256875701371 has 2 divisors, whose sum is σ = 1256875701372. Its totient is φ = 1256875701370.

The previous prime is 1256875701241. The next prime is 1256875701391. The reversal of 1256875701371 is 1731075786521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1256875701371 - 2³⁴ = 1239695832187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1256875701391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628437850685 + 628437850686.

It is an arithmetic number, because the mean of its divisors is an integer number (628437850686).

Almost surely, 2^{1256875701371} is an apocalyptic number.

1256875701371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256875701371 is an equidigital number, since it uses as much as digits as its factorization.

1256875701371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2469600, while the sum is 53.

The spelling of 1256875701371 in words is "one trillion, two hundred fifty-six billion, eight hundred seventy-five million, seven hundred one thousand, three hundred seventy-one".