13512225 has 24 divisors (see below), whose sum is σ = 22682080. Its totient is φ = 7096320.

The previous prime is 13512221. The next prime is 13512253. The reversal of 13512225 is 52221531.

It is not a de Polignac number, because 13512225 - 2² = 13512221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13512221) by changing a digit.

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, 3681 + ... + 6369.

Almost surely, 2^13512225 is an apocalyptic number.

13512225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13512225 is a deficient number, since it is larger than the sum of its proper divisors (9169855).

13512225 is a wasteful number, since it uses less digits than its factorization.

13512225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769 (or 2764 counting only the distinct ones).

The product of its digits is 600, while the sum is 21.

The square root of 13512225 is about 3675.8978495056. The cubic root of 13512225 is about 238.1820101029.

Adding to 13512225 its reverse (52221531), we get a palindrome (65733756).

The spelling of 13512225 in words is "thirteen million, five hundred twelve thousand, two hundred twenty-five".