13721153 has 8 divisors (see below), whose sum is σ = 14054376. Its totient is φ = 13392000.

The previous prime is 13721143. The next prime is 13721161. The reversal of 13721153 is 35112731.

It can be written as a sum of positive squares in 4 ways, for example, as 1555009 + 12166144 = 1247^2 + 3488^2 .

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 13721153 - 2¹⁰ = 13720129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13721143) 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, 6443 + ... + 8303.

It is an arithmetic number, because the mean of its divisors is an integer number (1756797).

Almost surely, 2^13721153 is an apocalyptic number.

It is an amenable number.

13721153 is a deficient number, since it is larger than the sum of its proper divisors (333223).

13721153 is a wasteful number, since it uses less digits than its factorization.

13721153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035.

The product of its digits is 630, while the sum is 23.

The square root of 13721153 is about 3704.2074725911. The cubic root of 13721153 is about 239.4033384770.

Adding to 13721153 its reverse (35112731), we get a palindrome (48833884).

The spelling of 13721153 in words is "thirteen million, seven hundred twenty-one thousand, one hundred fifty-three".