16449121 has 8 divisors (see below), whose sum is σ = 17843840. Its totient is φ = 15072912.

The previous prime is 16449113. The next prime is 16449131. The reversal of 16449121 is 12194461.

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

It is a cyclic number.

It is not a de Polignac number, because 16449121 - 2³ = 16449113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16449121.

It is not an unprimeable number, because it can be changed into a prime (16449131) 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, 2745 + ... + 6358.

It is an arithmetic number, because the mean of its divisors is an integer number (2230480).

Almost surely, 2^16449121 is an apocalyptic number.

It is an amenable number.

16449121 is a deficient number, since it is larger than the sum of its proper divisors (1394719).

16449121 is a wasteful number, since it uses less digits than its factorization.

16449121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9255.

The product of its digits is 1728, while the sum is 28.

The square root of 16449121 is about 4055.7515949575. The cubic root of 16449121 is about 254.3202245892.

The spelling of 16449121 in words is "sixteen million, four hundred forty-nine thousand, one hundred twenty-one".