12021825 has 24 divisors (see below), whose sum is σ = 20137600. Its totient is φ = 6327360.

The previous prime is 12021817. The next prime is 12021857. The reversal of 12021825 is 52812021.

It is a happy number.

It is not a de Polignac number, because 12021825 - 2³ = 12021817 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 23 ways as a sum of consecutive naturals, for example, 4911 + ... + 6939.

Almost surely, 2^12021825 is an apocalyptic number.

12021825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12021825 is a deficient number, since it is larger than the sum of its proper divisors (8115775).

12021825 is a wasteful number, since it uses less digits than its factorization.

12021825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121 (or 2116 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 12021825 is about 3467.2503515033. The cubic root of 12021825 is about 229.0815610521.

Adding to 12021825 its reverse (52812021), we get a palindrome (64833846).

It can be divided in two parts, 120 and 21825, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 12021825 in words is "twelve million, twenty-one thousand, eight hundred twenty-five".