12028281 has 8 divisors (see below), whose sum is σ = 16078560. Its totient is φ = 7998432.

The previous prime is 12028267. The next prime is 12028319. The reversal of 12028281 is 18282021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12028281 - 2⁵ = 12028249 is a prime.

It is a super-2 number, since 2×12028281² = 289359087629922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12028201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3675 + ... + 6128.

It is an arithmetic number, because the mean of its divisors is an integer number (2009820).

Almost surely, 2^12028281 is an apocalyptic number.

It is an amenable number.

12028281 is a deficient number, since it is larger than the sum of its proper divisors (4050279).

12028281 is an equidigital number, since it uses as much as digits as its factorization.

12028281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10215.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 12028281 is about 3468.1812236387. The cubic root of 12028281 is about 229.1225610914.

The spelling of 12028281 in words is "twelve million, twenty-eight thousand, two hundred eighty-one".