13625509 has 8 divisors (see below), whose sum is σ = 14225528. Its totient is φ = 13037760.

The previous prime is 13625501. The next prime is 13625533. The reversal of 13625509 is 90552631.

It can be written as a sum of positive squares in 4 ways, for example, as 324900 + 13300609 = 570^2 + 3647^2 .

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 13625509 - 2³ = 13625501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13625501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762 + ... + 5275.

It is an arithmetic number, because the mean of its divisors is an integer number (1778191).

Almost surely, 2^13625509 is an apocalyptic number.

It is an amenable number.

13625509 is a deficient number, since it is larger than the sum of its proper divisors (600019).

13625509 is an equidigital number, since it uses as much as digits as its factorization.

13625509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6135.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 13625509 is about 3691.2747120744. The cubic root of 13625509 is about 238.8457832285.

The spelling of 13625509 in words is "thirteen million, six hundred twenty-five thousand, five hundred nine".