12021253 has 4 divisors (see below), whose sum is σ = 12028588. Its totient is φ = 12013920.

The previous prime is 12021187. The next prime is 12021259. The reversal of 12021253 is 35212021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10125124 + 1896129 = 3182^2 + 1377^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021253 - 2⁹ = 12020741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43 + ... + 4903.

It is an arithmetic number, because the mean of its divisors is an integer number (3007147).

Almost surely, 2^12021253 is an apocalyptic number.

It is an amenable number.

12021253 is a deficient number, since it is larger than the sum of its proper divisors (7335).

12021253 is an equidigital number, since it uses as much as digits as its factorization.

12021253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7334.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 12021253 is about 3467.1678644104. The cubic root of 12021253 is about 229.0779277509.

Adding to 12021253 its reverse (35212021), we get a palindrome (47233274).

The spelling of 12021253 in words is "twelve million, twenty-one thousand, two hundred fifty-three".