12028251 has 4 divisors (see below), whose sum is σ = 16037672. Its totient is φ = 8018832.

The previous prime is 12028249. The next prime is 12028253. The reversal of 12028251 is 15282021.

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: 15282021 = 3 ⋅5094007.

It is an interprime number because it is at equal distance from previous prime (12028249) and next prime (12028253).

It is not a de Polignac number, because 12028251 - 2¹ = 12028249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12028253) 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, 2004706 + ... + 2004711.

It is an arithmetic number, because the mean of its divisors is an integer number (4009418).

Almost surely, 2^12028251 is an apocalyptic number.

12028251 is a deficient number, since it is larger than the sum of its proper divisors (4009421).

12028251 is an equidigital number, since it uses as much as digits as its factorization.

12028251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009420.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 12028251 is about 3468.1768986025. The cubic root of 12028251 is about 229.1223706047.

It can be divided in two parts, 1202 and 8251, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 12028251 in words is "twelve million, twenty-eight thousand, two hundred fifty-one".