16942081 has 12 divisors (see below), whose sum is σ = 19428012. Its totient is φ = 14716416.

The previous prime is 16942073. The next prime is 16942109. The reversal of 16942081 is 18024961.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 625 + 16941456 = 25^2 + 4116^2 .

It is not a de Polignac number, because 16942081 - 2³ = 16942073 is a prime.

It is a super-2 number, since 2×16942081² = 574068217221122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16942031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76 + ... + 5821.

It is an arithmetic number, because the mean of its divisors is an integer number (1619001).

Almost surely, 2^16942081 is an apocalyptic number.

It is an amenable number.

16942081 is a deficient number, since it is larger than the sum of its proper divisors (2485931).

16942081 is a wasteful number, since it uses less digits than its factorization.

16942081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940 (or 5927 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 16942081 is about 4116.0759225262. The cubic root of 16942081 is about 256.8358149292.

The spelling of 16942081 in words is "sixteen million, nine hundred forty-two thousand, eighty-one".