13860121 has 4 divisors (see below), whose sum is σ = 15120144. Its totient is φ = 12600100.

The previous prime is 13860109. The next prime is 13860127. The reversal of 13860121 is 12106831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13860121 - 2⁹ = 13859609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13860092 and 13860101.

It is not an unprimeable number, because it can be changed into a prime (13860127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629995 + ... + 630016.

It is an arithmetic number, because the mean of its divisors is an integer number (3780036).

Almost surely, 2^13860121 is an apocalyptic number.

13860121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13860121 is a deficient number, since it is larger than the sum of its proper divisors (1260023).

13860121 is a wasteful number, since it uses less digits than its factorization.

13860121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260022.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 13860121 is about 3722.9183445249. The cubic root of 13860121 is about 240.2088517660.

Adding to 13860121 its reverse (12106831), we get a palindrome (25966952).

The spelling of 13860121 in words is "thirteen million, eight hundred sixty thousand, one hundred twenty-one".