126556533 has 16 divisors (see below), whose sum is σ = 187911360. Its totient is φ = 84181968.

The previous prime is 126556489. The next prime is 126556589. The reversal of 126556533 is 335655621.

126556533 is a `hidden beast` number, since 1 + 2 + 65 + 565 + 33 = 666.

It is not a de Polignac number, because 126556533 - 2⁸ = 126556277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126556033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7591 + ... + 17627.

It is an arithmetic number, because the mean of its divisors is an integer number (11744460).

Almost surely, 2^126556533 is an apocalyptic number.

It is an amenable number.

126556533 is a deficient number, since it is larger than the sum of its proper divisors (61354827).

126556533 is a wasteful number, since it uses less digits than its factorization.

126556533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10513 (or 10507 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 126556533 is about 11249.7347968741. The cubic root of 126556533 is about 502.0668220546.

The spelling of 126556533 in words is "one hundred twenty-six million, five hundred fifty-six thousand, five hundred thirty-three".