16450121 has 4 divisors (see below), whose sum is σ = 16458372. Its totient is φ = 16441872.

The previous prime is 16450117. The next prime is 16450127. The reversal of 16450121 is 12105461.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11806096 + 4644025 = 3436^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 16450121 - 2² = 16450117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16450093 and 16450102.

It is not an unprimeable number, because it can be changed into a prime (16450127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935 + ... + 5811.

It is an arithmetic number, because the mean of its divisors is an integer number (4114593).

Almost surely, 2^16450121 is an apocalyptic number.

It is an amenable number.

16450121 is a deficient number, since it is larger than the sum of its proper divisors (8251).

16450121 is an equidigital number, since it uses as much as digits as its factorization.

16450121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8250.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 16450121 is about 4055.8748747958. The cubic root of 16450121 is about 254.3253781589.

Adding to 16450121 its reverse (12105461), we get a palindrome (28555582).

The spelling of 16450121 in words is "sixteen million, four hundred fifty thousand, one hundred twenty-one".