16798421 has 8 divisors (see below), whose sum is σ = 17258400. Its totient is φ = 16344400.

The previous prime is 16798399. The next prime is 16798427. The reversal of 16798421 is 12489761.

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 16798421 - 2⁶ = 16798357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16798427) 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, 4550 + ... + 7368.

It is an arithmetic number, because the mean of its divisors is an integer number (2157300).

Almost surely, 2^16798421 is an apocalyptic number.

It is an amenable number.

16798421 is a deficient number, since it is larger than the sum of its proper divisors (459979).

16798421 is a wasteful number, since it uses less digits than its factorization.

16798421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979.

The product of its digits is 24192, while the sum is 38.

The square root of 16798421 is about 4098.5876835808. The cubic root of 16798421 is about 256.1078087997.

The spelling of 16798421 in words is "sixteen million, seven hundred ninety-eight thousand, four hundred twenty-one".