450403421 has 6 divisors (see below), whose sum is σ = 487715130. Its totient is φ = 415756848.

The previous prime is 450403391. The next prime is 450403439. The reversal of 450403421 is 124304054.

It can be written as a sum of positive squares in 3 ways, for example, as 34692100 + 415711321 = 5890^2 + 20389^2 .

It is not a de Polignac number, because 450403421 - 2¹⁰ = 450402397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450403441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1332386 + ... + 1332723.

It is an arithmetic number, because the mean of its divisors is an integer number (81285855).

Almost surely, 2^450403421 is an apocalyptic number.

It is an amenable number.

450403421 is a deficient number, since it is larger than the sum of its proper divisors (37311709).

450403421 is a wasteful number, since it uses less digits than its factorization.

450403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665135 (or 2665122 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 450403421 is about 21222.7100295886. The cubic root of 450403421 is about 766.5383605280.

Adding to 450403421 its reverse (124304054), we get a palindrome (574707475).

The spelling of 450403421 in words is "four hundred fifty million, four hundred three thousand, four hundred twenty-one".