126556841 has 4 divisors (see below), whose sum is σ = 130920900. Its totient is φ = 122192784.

The previous prime is 126556819. The next prime is 126556847. The reversal of 126556841 is 148655621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46185616 + 80371225 = 6796^2 + 8965^2 .

It is a cyclic number.

It is not a de Polignac number, because 126556841 - 2¹⁰ = 126555817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 126556795 and 126556804.

It is not an unprimeable number, because it can be changed into a prime (126556847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2181986 + ... + 2182043.

It is an arithmetic number, because the mean of its divisors is an integer number (32730225).

Almost surely, 2^126556841 is an apocalyptic number.

It is an amenable number.

126556841 is a deficient number, since it is larger than the sum of its proper divisors (4364059).

126556841 is an equidigital number, since it uses as much as digits as its factorization.

126556841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4364058.

The product of its digits is 57600, while the sum is 38.

The square root of 126556841 is about 11249.7484860774. The cubic root of 126556841 is about 502.0672293468.

The spelling of 126556841 in words is "one hundred twenty-six million, five hundred fifty-six thousand, eight hundred forty-one".