16421442 has 16 divisors (see below), whose sum is σ = 33607200. Its totient is φ = 5346432.

The previous prime is 16421437. The next prime is 16421459. The reversal of 16421442 is 24412461.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31567 + ... + 32082.

It is an arithmetic number, because the mean of its divisors is an integer number (2100450).

Almost surely, 2^16421442 is an apocalyptic number.

16421442 is an abundant number, since it is smaller than the sum of its proper divisors (17185758).

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

16421442 is a wasteful number, since it uses less digits than its factorization.

16421442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63697.

The product of its digits is 1536, while the sum is 24.

The square root of 16421442 is about 4052.3378437638. The cubic root of 16421442 is about 254.1774959583.

The spelling of 16421442 in words is "sixteen million, four hundred twenty-one thousand, four hundred forty-two".