16535121 has 8 divisors (see below), whose sum is σ = 22758144. Its totient is φ = 10667760.

The previous prime is 16535107. The next prime is 16535147. The reversal of 16535121 is 12153561.

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

It is not a de Polignac number, because 16535121 - 2¹¹ = 16533073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16535091 and 16535100.

It is not an unprimeable number, because it can be changed into a prime (16535621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88806 + ... + 88991.

It is an arithmetic number, because the mean of its divisors is an integer number (2844768).

Almost surely, 2^16535121 is an apocalyptic number.

It is an amenable number.

16535121 is a deficient number, since it is larger than the sum of its proper divisors (6223023).

16535121 is a wasteful number, since it uses less digits than its factorization.

16535121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177831.

The product of its digits is 900, while the sum is 24.

The square root of 16535121 is about 4066.3400005410. The cubic root of 16535121 is about 254.7626703805.

Adding to 16535121 its reverse (12153561), we get a palindrome (28688682).

The spelling of 16535121 in words is "sixteen million, five hundred thirty-five thousand, one hundred twenty-one".