126905601 has 8 divisors (see below), whose sum is σ = 169378560. Its totient is φ = 84518192.

The previous prime is 126905573. The next prime is 126905621. The reversal of 126905601 is 106509621.

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

It is a cyclic number.

It is not a de Polignac number, because 126905601 - 2⁷ = 126905473 is a prime.

It is a super-2 number, since 2×126905601² = 32210063130342402, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126905621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17841 + ... + 23918.

It is an arithmetic number, because the mean of its divisors is an integer number (21172320).

Almost surely, 2^126905601 is an apocalyptic number.

It is an amenable number.

126905601 is a deficient number, since it is larger than the sum of its proper divisors (42472959).

126905601 is a wasteful number, since it uses less digits than its factorization.

126905601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42775.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 126905601 is about 11265.2386126526. The cubic root of 126905601 is about 502.5279982420.

The spelling of 126905601 in words is "one hundred twenty-six million, nine hundred five thousand, six hundred one".