1255012656397 has 2 divisors, whose sum is σ = 1255012656398. Its totient is φ = 1255012656396.

The previous prime is 1255012656343. The next prime is 1255012656437. The reversal of 1255012656397 is 7936562105521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 973209872196 + 281802784201 = 986514^2 + 530851^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255012656397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255012656097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627506328198 + 627506328199.

It is an arithmetic number, because the mean of its divisors is an integer number (627506328199).

Almost surely, 2^{1255012656397} is an apocalyptic number.

It is an amenable number.

1255012656397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255012656397 is an equidigital number, since it uses as much as digits as its factorization.

1255012656397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402000, while the sum is 52.

The spelling of 1255012656397 in words is "one trillion, two hundred fifty-five billion, twelve million, six hundred fifty-six thousand, three hundred ninety-seven".