1281513212527 has 2 divisors, whose sum is σ = 1281513212528. Its totient is φ = 1281513212526.

The previous prime is 1281513212471. The next prime is 1281513212531. The reversal of 1281513212527 is 7252123151821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1281513212527 - 2²³ = 1281504823919 is a prime.

It is a super-2 number, since 2×1281513212527² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1281513212527.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281513212027) 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, 640756606263 + 640756606264.

It is an arithmetic number, because the mean of its divisors is an integer number (640756606264).

Almost surely, 2^{1281513212527} is an apocalyptic number.

1281513212527 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281513212527 is an equidigital number, since it uses as much as digits as its factorization.

1281513212527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 40.

The spelling of 1281513212527 in words is "one trillion, two hundred eighty-one billion, five hundred thirteen million, two hundred twelve thousand, five hundred twenty-seven".