14251221 has 28 divisors (see below), whose sum is σ = 21680748. Its totient is φ = 9362304.

The previous prime is 14251217. The next prime is 14251241. The reversal of 14251221 is 12215241.

It can be written as a sum of positive squares in 2 ways, for example, as 5904900 + 8346321 = 2430^2 + 2889^2 .

It is not a de Polignac number, because 14251221 - 2² = 14251217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 14251194 and 14251203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14251241) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 82291 + ... + 82463.

Almost surely, 2^14251221 is an apocalyptic number.

It is an amenable number.

14251221 is a deficient number, since it is larger than the sum of its proper divisors (7429527).

14251221 is an equidigital number, since it uses as much as digits as its factorization.

14251221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 289 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 14251221 is about 3775.0789395720. The cubic root of 14251221 is about 242.4473035317.

Adding to 14251221 its reverse (12215241), we get a palindrome (26466462).

The spelling of 14251221 in words is "fourteen million, two hundred fifty-one thousand, two hundred twenty-one".