1217451236257 has 2 divisors, whose sum is σ = 1217451236258. Its totient is φ = 1217451236256.

The previous prime is 1217451236179. The next prime is 1217451236269. The reversal of 1217451236257 is 7526321547121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677261515681 + 540189720576 = 822959^2 + 734976^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217451236257 - 2²⁷ = 1217317018529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1217452236257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608725618128 + 608725618129.

It is an arithmetic number, because the mean of its divisors is an integer number (608725618129).

Almost surely, 2^{1217451236257} is an apocalyptic number.

It is an amenable number.

1217451236257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217451236257 is an equidigital number, since it uses as much as digits as its factorization.

1217451236257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 46.

The spelling of 1217451236257 in words is "one trillion, two hundred seventeen billion, four hundred fifty-one million, two hundred thirty-six thousand, two hundred fifty-seven".