16198121 has 8 divisors (see below), whose sum is σ = 16507680. Its totient is φ = 15890688.

The previous prime is 16198099. The next prime is 16198159. The reversal of 16198121 is 12189161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16198121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16198181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27785 + ... + 28361.

It is an arithmetic number, because the mean of its divisors is an integer number (2063460).

Almost surely, 2^16198121 is an apocalyptic number.

It is an amenable number.

16198121 is a deficient number, since it is larger than the sum of its proper divisors (309559).

16198121 is an equidigital number, since it uses as much as digits as its factorization.

16198121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063.

The product of its digits is 864, while the sum is 29.

The square root of 16198121 is about 4024.6889320791. The cubic root of 16198121 is about 253.0200164346.

The spelling of 16198121 in words is "sixteen million, one hundred ninety-eight thousand, one hundred twenty-one".