450278721 has 6 divisors (see below), whose sum is σ = 650402610. Its totient is φ = 300185808.

The previous prime is 450278707. The next prime is 450278723. The reversal of 450278721 is 127872054.

It can be written as a sum of positive squares in only one way, i.e., 435348225 + 14930496 = 20865^2 + 3864^2 .

It is a de Polignac number, because none of the positive numbers 2^k-450278721 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (450278723) 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, 25015476 + ... + 25015493.

It is an arithmetic number, because the mean of its divisors is an integer number (108400435).

Almost surely, 2^450278721 is an apocalyptic number.

It is an amenable number.

450278721 is a deficient number, since it is larger than the sum of its proper divisors (200123889).

450278721 is a wasteful number, since it uses less digits than its factorization.

450278721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50030975 (or 50030972 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 450278721 is about 21219.7719356265. The cubic root of 450278721 is about 766.4676119857.

The spelling of 450278721 in words is "four hundred fifty million, two hundred seventy-eight thousand, seven hundred twenty-one".