450721172 has 12 divisors (see below), whose sum is σ = 860467776. Its totient is φ = 204873240.

The previous prime is 450721171. The next prime is 450721207. The reversal of 450721172 is 271127054.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450721171) 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 in 3 ways as a sum of consecutive naturals, for example, 5121788 + ... + 5121875.

It is an arithmetic number, because the mean of its divisors is an integer number (71705648).

Almost surely, 2^450721172 is an apocalyptic number.

It is an amenable number.

450721172 is a deficient number, since it is larger than the sum of its proper divisors (409746604).

450721172 is a wasteful number, since it uses less digits than its factorization.

450721172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10243678 (or 10243676 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 450721172 is about 21230.1948177590. The cubic root of 450721172 is about 766.7185775394.

The spelling of 450721172 in words is "four hundred fifty million, seven hundred twenty-one thousand, one hundred seventy-two".