12553209 has 12 divisors (see below), whose sum is σ = 18475236. Its totient is φ = 8210592.

The previous prime is 12553207. The next prime is 12553213. The reversal of 12553209 is 90235521.

12553209 is a `hidden beast` number, since 125 + 532 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8573184 + 3980025 = 2928^2 + 1995^2 .

It is not a de Polignac number, because 12553209 - 2¹ = 12553207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12553207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12682 + ... + 13635.

It is an arithmetic number, because the mean of its divisors is an integer number (1539603).

Almost surely, 2^12553209 is an apocalyptic number.

It is an amenable number.

12553209 is a deficient number, since it is larger than the sum of its proper divisors (5922027).

12553209 is a wasteful number, since it uses less digits than its factorization.

12553209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26376 (or 26373 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 12553209 is about 3543.0508040388. The cubic root of 12553209 is about 232.4082746048.

The spelling of 12553209 in words is "twelve million, five hundred fifty-three thousand, two hundred nine".