1291500276427 has 2 divisors, whose sum is σ = 1291500276428. Its totient is φ = 1291500276426.

The previous prime is 1291500276371. The next prime is 1291500276481. The reversal of 1291500276427 is 7246720051921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1291500276427 is a prime.

It is a super-2 number, since 2×1291500276427² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1291500276727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645750138213 + 645750138214.

It is an arithmetic number, because the mean of its divisors is an integer number (645750138214).

Almost surely, 2^{1291500276427} is an apocalyptic number.

1291500276427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291500276427 is an equidigital number, since it uses as much as digits as its factorization.

1291500276427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 1291500276427 in words is "one trillion, two hundred ninety-one billion, five hundred million, two hundred seventy-six thousand, four hundred twenty-seven".