13170725 has 6 divisors (see below), whose sum is σ = 16331730. Its totient is φ = 10536560.

The previous prime is 13170721. The next prime is 13170739. The reversal of 13170725 is 52707131.

It can be written as a sum of positive squares in 3 ways, for example, as 432964 + 12737761 = 658^2 + 3569^2 .

It is not a de Polignac number, because 13170725 - 2² = 13170721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13170694 and 13170703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13170721) 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 5 ways as a sum of consecutive naturals, for example, 263390 + ... + 263439.

It is an arithmetic number, because the mean of its divisors is an integer number (2721955).

Almost surely, 2^13170725 is an apocalyptic number.

It is an amenable number.

13170725 is a deficient number, since it is larger than the sum of its proper divisors (3161005).

13170725 is an equidigital number, since it uses as much as digits as its factorization.

13170725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526839 (or 526834 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 13170725 is about 3629.1493493655. The cubic root of 13170725 is about 236.1583073153.

Adding to 13170725 its reverse (52707131), we get a palindrome (65877856).

The spelling of 13170725 in words is "thirteen million, one hundred seventy thousand, seven hundred twenty-five".