16038121 has 4 divisors (see below), whose sum is σ = 17496144. Its totient is φ = 14580100.

The previous prime is 16038091. The next prime is 16038133. The reversal of 16038121 is 12183061.

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 16038121 - 2¹⁹ = 15513833 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16038092 and 16038101.

It is not an unprimeable number, because it can be changed into a prime (16038721) 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, 728995 + ... + 729016.

It is an arithmetic number, because the mean of its divisors is an integer number (4374036).

Almost surely, 2^16038121 is an apocalyptic number.

16038121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16038121 is a deficient number, since it is larger than the sum of its proper divisors (1458023).

16038121 is a wasteful number, since it uses less digits than its factorization.

16038121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458022.

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

The square root of 16038121 is about 4004.7622900742. The cubic root of 16038121 is about 252.1841739638.

The spelling of 16038121 in words is "sixteen million, thirty-eight thousand, one hundred twenty-one".