126436121321597 has 2 divisors, whose sum is σ = 126436121321598. Its totient is φ = 126436121321596.

The previous prime is 126436121321567. The next prime is 126436121321617. The reversal of 126436121321597 is 795123121634621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84196663663876 + 42239457657721 = 9175874^2 + 6499189^2 .

It is a cyclic number.

It is not a de Polignac number, because 126436121321597 - 2²² = 126436117127293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126436121321567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63218060660798 + 63218060660799.

It is an arithmetic number, because the mean of its divisors is an integer number (63218060660799).

Almost surely, 2^{126436121321597} is an apocalyptic number.

It is an amenable number.

126436121321597 is a deficient number, since it is larger than the sum of its proper divisors (1).

126436121321597 is an equidigital number, since it uses as much as digits as its factorization.

126436121321597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 53.

The spelling of 126436121321597 in words is "one hundred twenty-six trillion, four hundred thirty-six billion, one hundred twenty-one million, three hundred twenty-one thousand, five hundred ninety-seven".