1296171123503 has 2 divisors, whose sum is σ = 1296171123504. Its totient is φ = 1296171123502.

The previous prime is 1296171123461. The next prime is 1296171123557. The reversal of 1296171123503 is 3053211716921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1296171123503 - 2³⁶ = 1227451646767 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296171123703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648085561751 + 648085561752.

It is an arithmetic number, because the mean of its divisors is an integer number (648085561752).

Almost surely, 2^{1296171123503} is an apocalyptic number.

1296171123503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296171123503 is an equidigital number, since it uses as much as digits as its factorization.

1296171123503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 1296171123503 in words is "one trillion, two hundred ninety-six billion, one hundred seventy-one million, one hundred twenty-three thousand, five hundred three".