16621042 has 8 divisors (see below), whose sum is σ = 26015616. Its totient is φ = 7949172.

The previous prime is 16621039. The next prime is 16621043. The reversal of 16621042 is 24012661.

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

It is not an unprimeable number, because it can be changed into a prime (16621043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180618 + ... + 180709.

It is an arithmetic number, because the mean of its divisors is an integer number (3251952).

Almost surely, 2^16621042 is an apocalyptic number.

16621042 is a deficient number, since it is larger than the sum of its proper divisors (9394574).

16621042 is a wasteful number, since it uses less digits than its factorization.

16621042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361352.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 16621042 is about 4076.8912175823. The cubic root of 16621042 is about 255.2031803700.

It can be divided in two parts, 1662 and 1042, that added together give a square (2704 = 52²).

The spelling of 16621042 in words is "sixteen million, six hundred twenty-one thousand, forty-two".