13125689 has 4 divisors (see below), whose sum is σ = 13146624. Its totient is φ = 13104756.

The previous prime is 13125667. The next prime is 13125691. The reversal of 13125689 is 98652131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98652131 = 5387 ⋅18313.

It is a cyclic number.

It is not a de Polignac number, because 13125689 - 2¹² = 13121593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13125089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9497 + ... + 10790.

It is an arithmetic number, because the mean of its divisors is an integer number (3286656).

Almost surely, 2^13125689 is an apocalyptic number.

It is an amenable number.

13125689 is a deficient number, since it is larger than the sum of its proper divisors (20935).

13125689 is an equidigital number, since it uses as much as digits as its factorization.

13125689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20934.

The product of its digits is 12960, while the sum is 35.

The square root of 13125689 is about 3622.9392763335. The cubic root of 13125689 is about 235.8888265514. Note that the first 4 decimals are identical.

The spelling of 13125689 in words is "thirteen million, one hundred twenty-five thousand, six hundred eighty-nine".