13243225 has 24 divisors (see below), whose sum is σ = 17151680. Its totient is φ = 10134720.

The previous prime is 13243213. The next prime is 13243253. The reversal of 13243225 is 52234231.

13243225 = 386² + 387² + ... + 459².

It is not a de Polignac number, because 13243225 - 2¹¹ = 13241177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13243196 and 13243205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95206 + ... + 95344.

Almost surely, 2^13243225 is an apocalyptic number.

It is an amenable number.

13243225 is a deficient number, since it is larger than the sum of its proper divisors (3908455).

13243225 is a wasteful number, since it uses less digits than its factorization.

13243225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 284 counting only the distinct ones).

The product of its digits is 1440, while the sum is 22.

The square root of 13243225 is about 3639.1242078280. The cubic root of 13243225 is about 236.5908362052.

Adding to 13243225 its reverse (52234231), we get a palindrome (65477456).

The spelling of 13243225 in words is "thirteen million, two hundred forty-three thousand, two hundred twenty-five".