16478121 has 16 divisors (see below), whose sum is σ = 24067008. Its totient is φ = 9945600.

The previous prime is 16478101. The next prime is 16478129. The reversal of 16478121 is 12187461.

It is not a de Polignac number, because 16478121 - 2⁵ = 16478089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16478129) 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 15 ways as a sum of consecutive naturals, for example, 8385 + ... + 10161.

It is an arithmetic number, because the mean of its divisors is an integer number (1504188).

Almost surely, 2^16478121 is an apocalyptic number.

16478121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16478121 is a deficient number, since it is larger than the sum of its proper divisors (7588887).

16478121 is a wasteful number, since it uses less digits than its factorization.

16478121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072.

The product of its digits is 2688, while the sum is 30.

The square root of 16478121 is about 4059.3251902256. The cubic root of 16478121 is about 254.4695933916.

The spelling of 16478121 in words is "sixteen million, four hundred seventy-eight thousand, one hundred twenty-one".