16404201 has 72 divisors (see below), whose sum is σ = 29955744. Its totient is φ = 8864640.

The previous prime is 16404197. The next prime is 16404229. The reversal of 16404201 is 10240461.

16404201 is a `hidden beast` number, since 1 + 640 + 4 + 20 + 1 = 666.

It is not a de Polignac number, because 16404201 - 2² = 16404197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16404251) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 863370 + ... + 863388.

It is an arithmetic number, because the mean of its divisors is an integer number (416052).

Almost surely, 2^16404201 is an apocalyptic number.

16404201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16404201 is a deficient number, since it is larger than the sum of its proper divisors (13551543).

16404201 is a wasteful number, since it uses less digits than its factorization.

16404201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 16404201 is about 4050.2099945558. The cubic root of 16404201 is about 254.0885104972.

Adding to 16404201 its reverse (10240461), we get a palindrome (26644662).

The spelling of 16404201 in words is "sixteen million, four hundred four thousand, two hundred one".