12405225 has 24 divisors (see below), whose sum is σ = 23440960. Its totient is φ = 5670720.

The previous prime is 12405221. The next prime is 12405269. The reversal of 12405225 is 52250421.

It is a happy number.

It is not a de Polignac number, because 12405225 - 2² = 12405221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11290 + ... + 12339.

Almost surely, 2^12405225 is an apocalyptic number.

12405225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12405225 is a deficient number, since it is larger than the sum of its proper divisors (11035735).

12405225 is a wasteful number, since it uses less digits than its factorization.

12405225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23649 (or 23644 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 12405225 is about 3522.1051943405. The cubic root of 12405225 is about 231.4914109084.

Adding to 12405225 its reverse (52250421), we get a palindrome (64655646).

The spelling of 12405225 in words is "twelve million, four hundred five thousand, two hundred twenty-five".