16804257 has 8 divisors (see below), whose sum is σ = 22485984. Its totient is φ = 11162688.

The previous prime is 16804241. The next prime is 16804261. The reversal of 16804257 is 75240861.

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

It is not a de Polignac number, because 16804257 - 2⁴ = 16804241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16804217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9048 + ... + 10745.

It is an arithmetic number, because the mean of its divisors is an integer number (2810748).

Almost surely, 2^16804257 is an apocalyptic number.

It is an amenable number.

16804257 is a deficient number, since it is larger than the sum of its proper divisors (5681727).

16804257 is a wasteful number, since it uses less digits than its factorization.

16804257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20079.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 16804257 is about 4099.2995743175. The cubic root of 16804257 is about 256.1374638115.

The spelling of 16804257 in words is "sixteen million, eight hundred four thousand, two hundred fifty-seven".