16601251 has 2 divisors, whose sum is σ = 16601252. Its totient is φ = 16601250.

The previous prime is 16601227. The next prime is 16601257. The reversal of 16601251 is 15210661.

It is a strong prime.

It is an emirp because it is prime and its reverse (15210661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16601251 - 2⁹ = 16600739 is a prime.

It is not a weakly prime, because it can be changed into another prime (16601257) 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, 8300625 + 8300626.

It is an arithmetic number, because the mean of its divisors is an integer number (8300626).

Almost surely, 2^16601251 is an apocalyptic number.

16601251 is a deficient number, since it is larger than the sum of its proper divisors (1).

16601251 is an equidigital number, since it uses as much as digits as its factorization.

16601251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 16601251 is about 4074.4632775373. The cubic root of 16601251 is about 255.1018483329.

The spelling of 16601251 in words is "sixteen million, six hundred one thousand, two hundred fifty-one".