13125757 has 4 divisors (see below), whose sum is σ = 13146876. Its totient is φ = 13104640.

The previous prime is 13125727. The next prime is 13125767. The reversal of 13125757 is 75752131.

13125757 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11148921 + 1976836 = 3339^2 + 1406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13125757 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13125727) 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, 9598 + ... + 10879.

It is an arithmetic number, because the mean of its divisors is an integer number (3286719).

Almost surely, 2^13125757 is an apocalyptic number.

It is an amenable number.

13125757 is a deficient number, since it is larger than the sum of its proper divisors (21119).

13125757 is an equidigital number, since it uses as much as digits as its factorization.

13125757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21118.

The product of its digits is 7350, while the sum is 31.

The square root of 13125757 is about 3622.9486609666. The cubic root of 13125757 is about 235.8892339056.

Adding to 13125757 its reverse (75752131), we get a palindrome (88877888).

The spelling of 13125757 in words is "thirteen million, one hundred twenty-five thousand, seven hundred fifty-seven".