12126825 has 18 divisors (see below), whose sum is σ = 21720894. Its totient is φ = 6467520.

The previous prime is 12126791. The next prime is 12126839. The reversal of 12126825 is 52862121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1648656 + 10478169 = 1284^2 + 3237^2 .

It is not a de Polignac number, because 12126825 - 2⁶ = 12126761 is a prime.

It is a Curzon number.

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 17 ways as a sum of consecutive naturals, for example, 26724 + ... + 27173.

Almost surely, 2^12126825 is an apocalyptic number.

12126825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12126825 is a deficient number, since it is larger than the sum of its proper divisors (9594069).

12126825 is a wasteful number, since it uses less digits than its factorization.

12126825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53913 (or 53905 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 12126825 is about 3482.3591141638. The cubic root of 12126825 is about 229.7465702577.

Adding to 12126825 its reverse (52862121), we get a palindrome (64988946).

The spelling of 12126825 in words is "twelve million, one hundred twenty-six thousand, eight hundred twenty-five".