450665261 has 2 divisors, whose sum is σ = 450665262. Its totient is φ = 450665260.

The previous prime is 450665233. The next prime is 450665263. The reversal of 450665261 is 162566054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384552100 + 66113161 = 19610^2 + 8131^2 .

It is a cyclic number.

It is not a de Polignac number, because 450665261 - 2²² = 446470957 is a prime.

It is a Sophie Germain prime.

Together with 450665263, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450665263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225332630 + 225332631.

It is an arithmetic number, because the mean of its divisors is an integer number (225332631).

Almost surely, 2^450665261 is an apocalyptic number.

It is an amenable number.

450665261 is a deficient number, since it is larger than the sum of its proper divisors (1).

450665261 is an equidigital number, since it uses as much as digits as its factorization.

450665261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 450665261 is about 21228.8779967289. The cubic root of 450665261 is about 766.6868729604.

The spelling of 450665261 in words is "four hundred fifty million, six hundred sixty-five thousand, two hundred sixty-one".