16871842 has 8 divisors (see below), whose sum is σ = 27254556. Its totient is φ = 7786992.

The previous prime is 16871821. The next prime is 16871851. The reversal of 16871842 is 24817861.

It can be written as a sum of positive squares in 2 ways, for example, as 15046641 + 1825201 = 3879^2 + 1351^2 .

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, 324433 + ... + 324484.

Almost surely, 2^16871842 is an apocalyptic number.

16871842 is a deficient number, since it is larger than the sum of its proper divisors (10382714).

16871842 is a wasteful number, since it uses less digits than its factorization.

16871842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648932.

The product of its digits is 21504, while the sum is 37.

The square root of 16871842 is about 4107.5347837846. The cubic root of 16871842 is about 256.4803906950.

It can be divided in two parts, 168 and 71842, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 16871842 in words is "sixteen million, eight hundred seventy-one thousand, eight hundred forty-two".