12025021 has 4 divisors (see below), whose sum is σ = 12547872. Its totient is φ = 11502172.

The previous prime is 12025003. The next prime is 12025031. The reversal of 12025021 is 12052021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12052021 = 109 ⋅110569.

It is a cyclic number.

It is not a de Polignac number, because 12025021 - 2⁷ = 12024893 is a prime.

It is a super-2 number, since 2×12025021² = 289202260100882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12024992 and 12025010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12025031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261391 + ... + 261436.

It is an arithmetic number, because the mean of its divisors is an integer number (3136968).

Almost surely, 2^12025021 is an apocalyptic number.

It is an amenable number.

12025021 is a deficient number, since it is larger than the sum of its proper divisors (522851).

12025021 is an equidigital number, since it uses as much as digits as its factorization.

12025021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522850.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 12025021 is about 3467.7112048151. The cubic root of 12025021 is about 229.1018596839.

Adding to 12025021 its reverse (12052021), we get a palindrome (24077042).

Subtracting 12025021 from its reverse (12052021), we obtain a cube (27000 = 30³).

The spelling of 12025021 in words is "twelve million, twenty-five thousand, twenty-one".