126555553 has 2 divisors, whose sum is σ = 126555554. Its totient is φ = 126555552.

The previous prime is 126555521. The next prime is 126555571. The reversal of 126555553 is 355555621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123921424 + 2634129 = 11132^2 + 1623^2 .

It is a cyclic number.

It is not a de Polignac number, because 126555553 - 2⁵ = 126555521 is a prime.

It is not a weakly prime, because it can be changed into another prime (126555353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63277776 + 63277777.

It is an arithmetic number, because the mean of its divisors is an integer number (63277777).

Almost surely, 2^126555553 is an apocalyptic number.

It is an amenable number.

126555553 is a deficient number, since it is larger than the sum of its proper divisors (1).

126555553 is an equidigital number, since it uses as much as digits as its factorization.

126555553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112500, while the sum is 37.

The square root of 126555553 is about 11249.6912402074. The cubic root of 126555553 is about 502.0655261205.

The spelling of 126555553 in words is "one hundred twenty-six million, five hundred fifty-five thousand, five hundred fifty-three".