450551421 has 12 divisors (see below), whose sum is σ = 651024348. Its totient is φ = 300262464.

The previous prime is 450551399. The next prime is 450551449. The reversal of 450551421 is 124155054.

It can be written as a sum of positive squares in 2 ways, for example, as 342620100 + 107931321 = 18510^2 + 10389^2 .

It is not a de Polignac number, because 450551421 - 2⁹ = 450550909 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450501421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25371 + ... + 39303.

It is an arithmetic number, because the mean of its divisors is an integer number (54252029).

Almost surely, 2^450551421 is an apocalyptic number.

It is an amenable number.

450551421 is a deficient number, since it is larger than the sum of its proper divisors (200472927).

450551421 is a wasteful number, since it uses less digits than its factorization.

450551421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17532 (or 17529 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 450551421 is about 21226.1965740450. The cubic root of 450551421 is about 766.6223113805.

The spelling of 450551421 in words is "four hundred fifty million, five hundred fifty-one thousand, four hundred twenty-one".