13621625 has 16 divisors (see below), whose sum is σ = 17297280. Its totient is φ = 10706800.

The previous prime is 13621603. The next prime is 13621627. The reversal of 13621625 is 52612631.

It is not a de Polignac number, because 13621625 - 2¹⁰ = 13620601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13621594 and 13621603.

It is not an unprimeable number, because it can be changed into a prime (13621627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6452 + ... + 8298.

It is an arithmetic number, because the mean of its divisors is an integer number (1081080).

Almost surely, 2^13621625 is an apocalyptic number.

It is an amenable number.

13621625 is a deficient number, since it is larger than the sum of its proper divisors (3675655).

13621625 is an equidigital number, since it uses as much as digits as its factorization.

13621625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921 (or 1911 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 13621625 is about 3690.7485690575. The cubic root of 13621625 is about 238.8230864573.

The spelling of 13621625 in words is "thirteen million, six hundred twenty-one thousand, six hundred twenty-five".