126556385 has 8 divisors (see below), whose sum is σ = 153433896. Its totient is φ = 100200960.

The previous prime is 126556379. The next prime is 126556399. The reversal of 126556385 is 583655621.

It can be written as a sum of positive squares in 4 ways, for example, as 44182609 + 82373776 = 6647^2 + 9076^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-126556385 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 129986 + ... + 130955.

It is an arithmetic number, because the mean of its divisors is an integer number (19179237).

Almost surely, 2^126556385 is an apocalyptic number.

It is an amenable number.

126556385 is a deficient number, since it is larger than the sum of its proper divisors (26877511).

126556385 is an equidigital number, since it uses as much as digits as its factorization.

126556385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261043.

The product of its digits is 216000, while the sum is 41.

The square root of 126556385 is about 11249.7282189393. The cubic root of 126556385 is about 502.0666263425.

The spelling of 126556385 in words is "one hundred twenty-six million, five hundred fifty-six thousand, three hundred eighty-five".