16235121 has 24 divisors (see below), whose sum is σ = 25362720. Its totient is φ = 9210432.

The previous prime is 16235117. The next prime is 16235143. The reversal of 16235121 is 12153261.

It is not a de Polignac number, because 16235121 - 2² = 16235117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (16235111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26005 + ... + 26621.

It is an arithmetic number, because the mean of its divisors is an integer number (1056780).

Almost surely, 2^16235121 is an apocalyptic number.

It is an amenable number.

16235121 is a deficient number, since it is larger than the sum of its proper divisors (9127599).

16235121 is a wasteful number, since it uses less digits than its factorization.

16235121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813 (or 806 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 16235121 is about 4029.2829386877. The cubic root of 16235121 is about 253.2125206879.

Adding to 16235121 its reverse (12153261), we get a palindrome (28388382).

The spelling of 16235121 in words is "sixteen million, two hundred thirty-five thousand, one hundred twenty-one".