16353121 has 2 divisors, whose sum is σ = 16353122. Its totient is φ = 16353120.

The previous prime is 16353109. The next prime is 16353173. The reversal of 16353121 is 12135361.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16160400 + 192721 = 4020^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 16353121 - 2¹¹ = 16351073 is a prime.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 16353092 and 16353101.

It is not a weakly prime, because it can be changed into another prime (16353101) 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 as a sum of consecutive naturals, namely, 8176560 + 8176561.

It is an arithmetic number, because the mean of its divisors is an integer number (8176561).

Almost surely, 2^16353121 is an apocalyptic number.

It is an amenable number.

16353121 is a deficient number, since it is larger than the sum of its proper divisors (1).

16353121 is an equidigital number, since it uses as much as digits as its factorization.

16353121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 22.

The square root of 16353121 is about 4043.8992321768. The cubic root of 16353121 is about 253.8245062583.

Adding to 16353121 its reverse (12135361), we get a palindrome (28488482).

The spelling of 16353121 in words is "sixteen million, three hundred fifty-three thousand, one hundred twenty-one".