16421120 has 36 divisors (see below), whose sum is σ = 39336780. Its totient is φ = 6567936.

The previous prime is 16421113. The next prime is 16421129. The reversal of 16421120 is 2112461.

It can be written as a sum of positive squares in 2 ways, for example, as 9535744 + 6885376 = 3088^2 + 2624^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16421129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5135 + ... + 7694.

Almost surely, 2^16421120 is an apocalyptic number.

16421120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16421120 is an abundant number, since it is smaller than the sum of its proper divisors (22915660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16421120 is an equidigital number, since it uses as much as digits as its factorization.

16421120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12850 (or 12836 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 16421120 is about 4052.2981134166. The cubic root of 16421120 is about 254.1758346002.

Adding to 16421120 its reverse (2112461), we get a palindrome (18533581).

The spelling of 16421120 in words is "sixteen million, four hundred twenty-one thousand, one hundred twenty".