13734221 has 8 divisors (see below), whose sum is σ = 14119224. Its totient is φ = 13351680.

The previous prime is 13734191. The next prime is 13734223. The reversal of 13734221 is 12243731.

It can be written as a sum of positive squares in 4 ways, for example, as 4818025 + 8916196 = 2195^2 + 2986^2 .

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 13734221 - 2¹⁰ = 13733197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13734223) 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, 18371 + ... + 19103.

It is an arithmetic number, because the mean of its divisors is an integer number (1764903).

Almost surely, 2^13734221 is an apocalyptic number.

It is an amenable number.

13734221 is a deficient number, since it is larger than the sum of its proper divisors (385003).

13734221 is an equidigital number, since it uses as much as digits as its factorization.

13734221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231.

The product of its digits is 1008, while the sum is 23.

The square root of 13734221 is about 3705.9709928708. The cubic root of 13734221 is about 239.4793167896.

Adding to 13734221 its reverse (12243731), we get a palindrome (25977952).

The spelling of 13734221 in words is "thirteen million, seven hundred thirty-four thousand, two hundred twenty-one".