13125601 has 4 divisors (see below), whose sum is σ = 13134100. Its totient is φ = 13117104.

The previous prime is 13125569. The next prime is 13125611. The reversal of 13125601 is 10652131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7480225 + 5645376 = 2735^2 + 2376^2 .

It is a cyclic number.

It is not a de Polignac number, because 13125601 - 2⁵ = 13125569 is a prime.

It is a super-2 number, since 2×13125601² = 344562803222402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13125611) 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 3 ways as a sum of consecutive naturals, for example, 1206 + ... + 5263.

It is an arithmetic number, because the mean of its divisors is an integer number (3283525).

Almost surely, 2^13125601 is an apocalyptic number.

It is an amenable number.

13125601 is a deficient number, since it is larger than the sum of its proper divisors (8499).

13125601 is an equidigital number, since it uses as much as digits as its factorization.

13125601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8498.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 13125601 is about 3622.9271314781. The cubic root of 13125601 is about 235.8882993851. Note that the first 3 decimals are identical.

Adding to 13125601 its reverse (10652131), we get a palindrome (23777732).

The spelling of 13125601 in words is "thirteen million, one hundred twenty-five thousand, six hundred one".