12028621 has 16 divisors (see below), whose sum is σ = 13608000. Its totient is φ = 10537600.

The previous prime is 12028603. The next prime is 12028637. The reversal of 12028621 is 12682021.

It is a cyclic number.

It is not a de Polignac number, because 12028621 - 2⁷ = 12028493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12028592 and 12028601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12028661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67110 + ... + 67288.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^12028621 is an apocalyptic number.

12028621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12028621 is a deficient number, since it is larger than the sum of its proper divisors (1579379).

12028621 is a wasteful number, since it uses less digits than its factorization.

12028621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 12028621 is about 3468.2302403387. The cubic root of 12028621 is about 229.1247199185.

The spelling of 12028621 in words is "twelve million, twenty-eight thousand, six hundred twenty-one".