12281825 has 6 divisors (see below), whose sum is σ = 15229494. Its totient is φ = 9825440.

The previous prime is 12281813. The next prime is 12281827. The reversal of 12281825 is 52818221.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 10816 + 12271009 = 104^2 + 3503^2 .

It is not a de Polignac number, because 12281825 - 2¹⁴ = 12265441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12281827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 245612 + ... + 245661.

It is an arithmetic number, because the mean of its divisors is an integer number (2538249).

Almost surely, 2^12281825 is an apocalyptic number.

It is an amenable number.

12281825 is a deficient number, since it is larger than the sum of its proper divisors (2947669).

12281825 is an equidigital number, since it uses as much as digits as its factorization.

12281825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491283 (or 491278 counting only the distinct ones).

The product of its digits is 2560, while the sum is 29.

The square root of 12281825 is about 3504.5434795420. The cubic root of 12281825 is about 230.7212707313.

The spelling of 12281825 in words is "twelve million, two hundred eighty-one thousand, eight hundred twenty-five".