16449425 has 12 divisors (see below), whose sum is σ = 20629260. Its totient is φ = 13009920.

The previous prime is 16449403. The next prime is 16449427. The reversal of 16449425 is 52494461.

It can be written as a sum of positive squares in 6 ways, for example, as 3690241 + 12759184 = 1921^2 + 3572^2 .

It is not a de Polignac number, because 16449425 - 2¹² = 16445329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16449427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1472 + ... + 5921.

It is an arithmetic number, because the mean of its divisors is an integer number (1719105).

Almost surely, 2^16449425 is an apocalyptic number.

It is an amenable number.

16449425 is a deficient number, since it is larger than the sum of its proper divisors (4179835).

16449425 is an equidigital number, since it uses as much as digits as its factorization.

16449425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7492 (or 7487 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 16449425 is about 4055.7890724247. The cubic root of 16449425 is about 254.3217912965.

The spelling of 16449425 in words is "sixteen million, four hundred forty-nine thousand, four hundred twenty-five".