15012225 has 18 divisors (see below), whose sum is σ = 26888966. Its totient is φ = 8006400.

The previous prime is 15012199. The next prime is 15012233. The reversal of 15012225 is 52221051.

It can be written as a sum of positive squares in 3 ways, for example, as 746496 + 14265729 = 864^2 + 3777^2 .

It is not a de Polignac number, because 15012225 - 2⁷ = 15012097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15012198 and 15012207.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33136 + ... + 33585.

Almost surely, 2^15012225 is an apocalyptic number.

15012225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15012225 is a deficient number, since it is larger than the sum of its proper divisors (11876741).

15012225 is a wasteful number, since it uses less digits than its factorization.

15012225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66737 (or 66729 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 15012225 is about 3874.5612654854. The cubic root of 15012225 is about 246.6881880013.

Adding to 15012225 its reverse (52221051), we get a palindrome (67233276).

The spelling of 15012225 in words is "fifteen million, twelve thousand, two hundred twenty-five".