12655625 has 10 divisors (see below), whose sum is σ = 15815250. Its totient is φ = 10124000.

The previous prime is 12655619. The next prime is 12655637. The reversal of 12655625 is 52655621.

It can be written as a sum of positive squares in 5 ways, for example, as 6285049 + 6370576 = 2507^2 + 2524^2 .

It is not a de Polignac number, because 12655625 - 2⁶ = 12655561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12655591 and 12655600.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9500 + ... + 10749.

It is an arithmetic number, because the mean of its divisors is an integer number (1581525).

Almost surely, 2^12655625 is an apocalyptic number.

It is an amenable number.

12655625 is a deficient number, since it is larger than the sum of its proper divisors (3159625).

12655625 is an frugal number, since it uses more digits than its factorization.

12655625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20269 (or 20254 counting only the distinct ones).

The product of its digits is 18000, while the sum is 32.

The square root of 12655625 is about 3557.4745255588. The cubic root of 12655625 is about 233.0386017939.

The spelling of 12655625 in words is "twelve million, six hundred fifty-five thousand, six hundred twenty-five".