13245221 has 8 divisors (see below), whose sum is σ = 14499264. Its totient is φ = 11999520.

The previous prime is 13245203. The next prime is 13245233. The reversal of 13245221 is 12254231.

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

It is a cyclic number.

It is not a de Polignac number, because 13245221 - 2¹⁴ = 13228837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13245193 and 13245202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13245251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1520 + ... + 5366.

It is an arithmetic number, because the mean of its divisors is an integer number (1812408).

Almost surely, 2^13245221 is an apocalyptic number.

13245221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13245221 is a deficient number, since it is larger than the sum of its proper divisors (1254043).

13245221 is a wasteful number, since it uses less digits than its factorization.

13245221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171.

The product of its digits is 480, while the sum is 20.

The square root of 13245221 is about 3639.3984393028. The cubic root of 13245221 is about 236.6027218193.

Adding to 13245221 its reverse (12254231), we get a palindrome (25499452).

The spelling of 13245221 in words is "thirteen million, two hundred forty-five thousand, two hundred twenty-one".