16421072 has 20 divisors (see below), whose sum is σ = 32843136. Its totient is φ = 7945440.

The previous prime is 16421071. The next prime is 16421087. The reversal of 16421072 is 27012461.

16421072 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16058 + ... + 17049.

Almost surely, 2^16421072 is an apocalyptic number.

It is an amenable number.

16421072 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16421072 is a wasteful number, since it uses less digits than its factorization.

16421072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33146 (or 33140 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 16421072 is about 4052.2921908471. The cubic root of 16421072 is about 254.1755869424.

The spelling of 16421072 in words is "sixteen million, four hundred twenty-one thousand, seventy-two".