450685421 has 2 divisors, whose sum is σ = 450685422. Its totient is φ = 450685420.

The previous prime is 450685393. The next prime is 450685423. The reversal of 450685421 is 124586054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264062500 + 186622921 = 16250^2 + 13661^2 .

It is a cyclic number.

It is not a de Polignac number, because 450685421 - 2⁶ = 450685357 is a prime.

Together with 450685423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450685423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225342710 + 225342711.

It is an arithmetic number, because the mean of its divisors is an integer number (225342711).

Almost surely, 2^450685421 is an apocalyptic number.

It is an amenable number.

450685421 is a deficient number, since it is larger than the sum of its proper divisors (1).

450685421 is an equidigital number, since it uses as much as digits as its factorization.

450685421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 450685421 is about 21229.3528163249. The cubic root of 450685421 is about 766.6983050796.

The spelling of 450685421 in words is "four hundred fifty million, six hundred eighty-five thousand, four hundred twenty-one".