126057561 has 8 divisors (see below), whose sum is σ = 192087744. Its totient is φ = 72032880.

The previous prime is 126057559. The next prime is 126057583. The reversal of 126057561 is 165750621.

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

It is not a de Polignac number, because 126057561 - 2¹ = 126057559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126057521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3001350 + ... + 3001391.

It is an arithmetic number, because the mean of its divisors is an integer number (24010968).

Almost surely, 2^126057561 is an apocalyptic number.

It is an amenable number.

126057561 is a deficient number, since it is larger than the sum of its proper divisors (66030183).

126057561 is an equidigital number, since it uses as much as digits as its factorization.

126057561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002751.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 126057561 is about 11227.5358382862. The cubic root of 126057561 is about 501.4061232612.

The spelling of 126057561 in words is "one hundred twenty-six million, fifty-seven thousand, five hundred sixty-one".