1275864652427 has 2 divisors, whose sum is σ = 1275864652428. Its totient is φ = 1275864652426.

The previous prime is 1275864652421. The next prime is 1275864652429. The reversal of 1275864652427 is 7242564685721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1275864652427 - 2¹⁴ = 1275864636043 is a prime.

It is a super-2 number, since 2×1275864652427² (a number of 25 digits) contains 22 as substring.

Together with 1275864652429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1275864652421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637932326213 + 637932326214.

It is an arithmetic number, because the mean of its divisors is an integer number (637932326214).

Almost surely, 2^{1275864652427} is an apocalyptic number.

1275864652427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275864652427 is an equidigital number, since it uses as much as digits as its factorization.

1275864652427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45158400, while the sum is 59.

It can be divided in two parts, 1275864 and 652427, that added together give a palindrome (1928291).

The spelling of 1275864652427 in words is "one trillion, two hundred seventy-five billion, eight hundred sixty-four million, six hundred fifty-two thousand, four hundred twenty-seven".