13853121 has 16 divisors (see below), whose sum is σ = 19215168. Its totient is φ = 8875680.

The previous prime is 13853101. The next prime is 13853131. The reversal of 13853121 is 12135831.

It is not a de Polignac number, because 13853121 - 2⁵ = 13853089 is a prime.

It is a super-2 number, since 2×13853121² = 383817922881282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13853091 and 13853100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13853101) 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 15 ways as a sum of consecutive naturals, for example, 206730 + ... + 206796.

It is an arithmetic number, because the mean of its divisors is an integer number (1200948).

Almost surely, 2^13853121 is an apocalyptic number.

It is an amenable number.

13853121 is a deficient number, since it is larger than the sum of its proper divisors (5362047).

13853121 is an frugal number, since it uses more digits than its factorization.

13853121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 111 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 13853121 is about 3721.9781031059. The cubic root of 13853121 is about 240.1684061087.

Adding to 13853121 its reverse (12135831), we get a palindrome (25988952).

The spelling of 13853121 in words is "thirteen million, eight hundred fifty-three thousand, one hundred twenty-one".