16621442 has 8 divisors (see below), whose sum is σ = 25248000. Its totient is φ = 8205444.

The previous prime is 16621417. The next prime is 16621453. The reversal of 16621442 is 24412661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52442 + ... + 52757.

It is an arithmetic number, because the mean of its divisors is an integer number (3156000).

Almost surely, 2^16621442 is an apocalyptic number.

16621442 is a deficient number, since it is larger than the sum of its proper divisors (8626558).

16621442 is a wasteful number, since it uses less digits than its factorization.

16621442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105280.

The product of its digits is 2304, while the sum is 26.

The square root of 16621442 is about 4076.9402742743. The cubic root of 16621442 is about 255.2052275833.

The spelling of 16621442 in words is "sixteen million, six hundred twenty-one thousand, four hundred forty-two".