16421712 has 40 divisors (see below), whose sum is σ = 42872256. Its totient is φ = 5415936.

The previous prime is 16421707. The next prime is 16421731. The reversal of 16421712 is 21712461.

16421712 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2893 + ... + 6419.

Almost surely, 2^16421712 is an apocalyptic number.

16421712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16421712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21436128).

16421712 is an abundant number, since it is smaller than the sum of its proper divisors (26450544).

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

16421712 is a wasteful number, since it uses less digits than its factorization.

16421712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635 (or 3629 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 16421712 is about 4052.3711577298. The cubic root of 16421712 is about 254.1788890058.

The spelling of 16421712 in words is "sixteen million, four hundred twenty-one thousand, seven hundred twelve".