126556 has 12 divisors (see below), whose sum is σ = 229320. Its totient is φ = 61040.

The previous prime is 126551. The next prime is 126583. The reversal of 126556 is 655621.

It is a super-2 number, since 2×126556² = 32032842272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430 + ... + 661.

It is an arithmetic number, because the mean of its divisors is an integer number (19110).

2¹²⁶⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

126556 is a deficient number, since it is larger than the sum of its proper divisors (102764).

126556 is a wasteful number, since it uses less digits than its factorization.

126556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 1122 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 126556 is about 355.7471011828. The cubic root of 126556 is about 50.2066117226.

The spelling of 126556 in words is "one hundred twenty-six thousand, five hundred fifty-six".