13425509 has 8 divisors (see below), whose sum is σ = 13715520. Its totient is φ = 13137696.

The previous prime is 13425481. The next prime is 13425539. The reversal of 13425509 is 90552431.

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 13425509 - 2⁸ = 13425253 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 (13425539) 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, 18104 + ... + 18830.

It is an arithmetic number, because the mean of its divisors is an integer number (1714440).

Almost surely, 2^13425509 is an apocalyptic number.

It is an amenable number.

13425509 is a deficient number, since it is larger than the sum of its proper divisors (290011).

13425509 is an equidigital number, since it uses as much as digits as its factorization.

13425509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 13425509 is about 3664.0836507918. The cubic root of 13425509 is about 237.6713976067.

The spelling of 13425509 in words is "thirteen million, four hundred twenty-five thousand, five hundred nine".