12028417 has 4 divisors (see below), whose sum is σ = 12443220. Its totient is φ = 11613616.

The previous prime is 12028409. The next prime is 12028421. The reversal of 12028417 is 71482021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71482021 = 13 ⋅5498617.

It can be written as a sum of positive squares in 2 ways, for example, as 7706176 + 4322241 = 2776^2 + 2079^2 .

It is a cyclic number.

It is not a de Polignac number, because 12028417 - 2³ = 12028409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12028391 and 12028400.

It is not an unprimeable number, because it can be changed into a prime (12028447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207358 + ... + 207415.

It is an arithmetic number, because the mean of its divisors is an integer number (3110805).

Almost surely, 2^12028417 is an apocalyptic number.

It is an amenable number.

12028417 is a deficient number, since it is larger than the sum of its proper divisors (414803).

12028417 is an equidigital number, since it uses as much as digits as its factorization.

12028417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414802.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 12028417 is about 3468.2008304018. The cubic root of 12028417 is about 229.1234246271.

The spelling of 12028417 in words is "twelve million, twenty-eight thousand, four hundred seventeen".