126509601 has 8 divisors (see below), whose sum is σ = 171197344. Its totient is φ = 83080800.

The previous prime is 126509567. The next prime is 126509609. The reversal of 126509601 is 106905621.

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

It is not a de Polignac number, because 126509601 - 2²³ = 118120993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126509609) 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, 314500 + ... + 314901.

It is an arithmetic number, because the mean of its divisors is an integer number (21399668).

Almost surely, 2^126509601 is an apocalyptic number.

It is an amenable number.

126509601 is a deficient number, since it is larger than the sum of its proper divisors (44687743).

126509601 is an equidigital number, since it uses as much as digits as its factorization.

126509601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629471.

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

The square root of 126509601 is about 11247.6486876147. The cubic root of 126509601 is about 502.0047525251.

The spelling of 126509601 in words is "one hundred twenty-six million, five hundred nine thousand, six hundred one".