16405201 has 2 divisors, whose sum is σ = 16405202. Its totient is φ = 16405200.

The previous prime is 16405183. The next prime is 16405229. The reversal of 16405201 is 10250461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14622976 + 1782225 = 3824^2 + 1335^2 .

It is a cyclic number.

It is not a de Polignac number, because 16405201 - 2¹³ = 16397009 is a prime.

It is not a weakly prime, because it can be changed into another prime (16405241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8202600 + 8202601.

It is an arithmetic number, because the mean of its divisors is an integer number (8202601).

Almost surely, 2^16405201 is an apocalyptic number.

It is an amenable number.

16405201 is a deficient number, since it is larger than the sum of its proper divisors (1).

16405201 is an equidigital number, since it uses as much as digits as its factorization.

16405201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 16405201 is about 4050.3334430637. Note that the first 3 decimals coincide. The cubic root of 16405201 is about 254.0936734704.

Adding to 16405201 its reverse (10250461), we get a palindrome (26655662).

The spelling of 16405201 in words is "sixteen million, four hundred five thousand, two hundred one".