16642601 has 2 divisors, whose sum is σ = 16642602. Its totient is φ = 16642600.

The previous prime is 16642573. The next prime is 16642621. The reversal of 16642601 is 10624661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10272025 + 6370576 = 3205^2 + 2524^2 .

It is a cyclic number.

It is not a de Polignac number, because 16642601 - 2¹⁰ = 16641577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16642621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8321300 + 8321301.

It is an arithmetic number, because the mean of its divisors is an integer number (8321301).

Almost surely, 2^16642601 is an apocalyptic number.

It is an amenable number.

16642601 is a deficient number, since it is larger than the sum of its proper divisors (1).

16642601 is an equidigital number, since it uses as much as digits as its factorization.

16642601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 16642601 is about 4079.5344097090. The cubic root of 16642601 is about 255.3134732595.

The spelling of 16642601 in words is "sixteen million, six hundred forty-two thousand, six hundred one".