16781042 has 8 divisors (see below), whose sum is σ = 25197696. Its totient is φ = 8381812.

The previous prime is 16781033. The next prime is 16781059. The reversal of 16781042 is 24018761.

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

It is a junction number, because it is equal to n+sod(n) for n = 16780996 and 16781014.

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, 1598 + ... + 6009.

It is an arithmetic number, because the mean of its divisors is an integer number (3149712).

Almost surely, 2^16781042 is an apocalyptic number.

16781042 is a deficient number, since it is larger than the sum of its proper divisors (8416654).

16781042 is a wasteful number, since it uses less digits than its factorization.

16781042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8712.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 16781042 is about 4096.4670143918. The cubic root of 16781042 is about 256.0194585632.

The spelling of 16781042 in words is "sixteen million, seven hundred eighty-one thousand, forty-two".