12021453 has 24 divisors (see below), whose sum is σ = 18325216. Its totient is φ = 7873200.

The previous prime is 12021403. The next prime is 12021473. The reversal of 12021453 is 35412021.

It is not a de Polignac number, because 12021453 - 2¹⁷ = 11890381 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 (12021403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14418 + ... + 15228.

Almost surely, 2^12021453 is an apocalyptic number.

It is an amenable number.

12021453 is a deficient number, since it is larger than the sum of its proper divisors (6303763).

12021453 is an frugal number, since it uses more digits than its factorization.

12021453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 12021453 is about 3467.1967062744. The cubic root of 12021453 is about 229.0791981490.

Adding to 12021453 its reverse (35412021), we get a palindrome (47433474).

The spelling of 12021453 in words is "twelve million, twenty-one thousand, four hundred fifty-three".