126556123 has 2 divisors, whose sum is σ = 126556124. Its totient is φ = 126556122.

The previous prime is 126556117. The next prime is 126556139. The reversal of 126556123 is 321655621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126556123 is a prime.

It is a super-2 number, since 2×126556123² = 32032904537582258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126556153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63278061 + 63278062.

It is an arithmetic number, because the mean of its divisors is an integer number (63278062).

Almost surely, 2^126556123 is an apocalyptic number.

126556123 is a deficient number, since it is larger than the sum of its proper divisors (1).

126556123 is an equidigital number, since it uses as much as digits as its factorization.

126556123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 126556123 is about 11249.7165742075. The cubic root of 126556123 is about 502.0662798789.

The spelling of 126556123 in words is "one hundred twenty-six million, five hundred fifty-six thousand, one hundred twenty-three".