126905553 has 6 divisors (see below), whose sum is σ = 183308034. Its totient is φ = 84603696.

The previous prime is 126905551. The next prime is 126905563. The reversal of 126905553 is 355509621.

126905553 is a `hidden beast` number, since 12 + 6 + 90 + 5 + 553 = 666.

It can be written as a sum of positive squares in only one way, i.e., 120494529 + 6411024 = 10977^2 + 2532^2 .

It is not a de Polignac number, because 126905553 - 2¹ = 126905551 is a prime.

It is a super-2 number, since 2×126905553² = 32210038764471618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126905551) 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 in 5 ways as a sum of consecutive naturals, for example, 7050300 + ... + 7050317.

It is an arithmetic number, because the mean of its divisors is an integer number (30551339).

Almost surely, 2^126905553 is an apocalyptic number.

It is an amenable number.

126905553 is a deficient number, since it is larger than the sum of its proper divisors (56402481).

126905553 is a wasteful number, since it uses less digits than its factorization.

126905553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14100623 (or 14100620 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The square root of 126905553 is about 11265.2364822049. The cubic root of 126905553 is about 502.5279348842.

The spelling of 126905553 in words is "one hundred twenty-six million, nine hundred five thousand, five hundred fifty-three".