13125605 has 8 divisors (see below), whose sum is σ = 15771672. Its totient is φ = 10486528.

The previous prime is 13125569. The next prime is 13125611. The reversal of 13125605 is 50652131.

13125605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 158404 + 12967201 = 398^2 + 3601^2 .

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 13125605 - 2⁸ = 13125349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4289 + ... + 6681.

It is an arithmetic number, because the mean of its divisors is an integer number (1971459).

Almost surely, 2^13125605 is an apocalyptic number.

It is an amenable number.

13125605 is a deficient number, since it is larger than the sum of its proper divisors (2646067).

13125605 is a wasteful number, since it uses less digits than its factorization.

13125605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3495.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 13125605 is about 3622.9276835178. The cubic root of 13125605 is about 235.8883233473. Note that the first 3 decimals are identical.

Adding to 13125605 its reverse (50652131), we get a palindrome (63777736).

The spelling of 13125605 in words is "thirteen million, one hundred twenty-five thousand, six hundred five".