406645601 has 2 divisors, whose sum is σ = 406645602. Its totient is φ = 406645600.

The previous prime is 406645597. The next prime is 406645607. The reversal of 406645601 is 106546604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255232576 + 151413025 = 15976^2 + 12305^2 .

It is a cyclic number.

It is not a de Polignac number, because 406645601 - 2² = 406645597 is a prime.

It is not a weakly prime, because it can be changed into another prime (406645607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203322800 + 203322801.

It is an arithmetic number, because the mean of its divisors is an integer number (203322801).

Almost surely, 2^406645601 is an apocalyptic number.

It is an amenable number.

406645601 is a deficient number, since it is larger than the sum of its proper divisors (1).

406645601 is an equidigital number, since it uses as much as digits as its factorization.

406645601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 406645601 is about 20165.4556358144. The cubic root of 406645601 is about 740.8643424757.

The spelling of 406645601 in words is "four hundred six million, six hundred forty-five thousand, six hundred one".