126341257621 has 2 divisors, whose sum is σ = 126341257622. Its totient is φ = 126341257620.

The previous prime is 126341257613. The next prime is 126341257631. The reversal of 126341257621 is 126752143621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126248038596 + 93219025 = 355314^2 + 9655^2 .

It is a cyclic number.

It is not a de Polignac number, because 126341257621 - 2³ = 126341257613 is a prime.

It is a super-2 number, since 2×126341257621² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126341257631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63170628810 + 63170628811.

It is an arithmetic number, because the mean of its divisors is an integer number (63170628811).

Almost surely, 2^126341257621 is an apocalyptic number.

It is an amenable number.

126341257621 is a deficient number, since it is larger than the sum of its proper divisors (1).

126341257621 is an equidigital number, since it uses as much as digits as its factorization.

126341257621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The spelling of 126341257621 in words is "one hundred twenty-six billion, three hundred forty-one million, two hundred fifty-seven thousand, six hundred twenty-one".