13821137 has 8 divisors (see below), whose sum is σ = 15733440. Its totient is φ = 12018160.

The previous prime is 13821121. The next prime is 13821161. The reversal of 13821137 is 73112831.

13821137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13821137 - 2⁴ = 13821121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13821167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27062 + ... + 27567.

It is an arithmetic number, because the mean of its divisors is an integer number (1966680).

Almost surely, 2^13821137 is an apocalyptic number.

It is an amenable number.

13821137 is a deficient number, since it is larger than the sum of its proper divisors (1912303).

13821137 is a wasteful number, since it uses less digits than its factorization.

13821137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54663.

The product of its digits is 1008, while the sum is 26.

The square root of 13821137 is about 3717.6789802241. The cubic root of 13821137 is about 239.9834305690.

Adding to 13821137 its reverse (73112831), we get a palindrome (86933968).

The spelling of 13821137 in words is "thirteen million, eight hundred twenty-one thousand, one hundred thirty-seven".