126501256061 has 2 divisors, whose sum is σ = 126501256062. Its totient is φ = 126501256060.

The previous prime is 126501256043. The next prime is 126501256073. The reversal of 126501256061 is 160652105621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110752512025 + 15748744036 = 332795^2 + 125494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126501256061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126501256361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63250628030 + 63250628031.

It is an arithmetic number, because the mean of its divisors is an integer number (63250628031).

Almost surely, 2^126501256061 is an apocalyptic number.

It is an amenable number.

126501256061 is a deficient number, since it is larger than the sum of its proper divisors (1).

126501256061 is an equidigital number, since it uses as much as digits as its factorization.

126501256061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 126501256061 in words is "one hundred twenty-six billion, five hundred one million, two hundred fifty-six thousand, sixty-one".