451721472 has 144 divisors (see below), whose sum is σ = 1271531520. Its totient is φ = 142084096.

The previous prime is 451721461. The next prime is 451721497. The reversal of 451721472 is 274127154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1889929 + ... + 1890167.

It is an arithmetic number, because the mean of its divisors is an integer number (8830080).

Almost surely, 2^451721472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451721472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635765760).

451721472 is an abundant number, since it is smaller than the sum of its proper divisors (819810048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451721472 is a wasteful number, since it uses less digits than its factorization.

451721472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 374 counting only the distinct ones).

The product of its digits is 15680, while the sum is 33.

The square root of 451721472 is about 21253.7401884939. The cubic root of 451721472 is about 767.2853595235.

It can be divided in two parts, 451721 and 472, that multiplied together give a palindrome (213212312).

The spelling of 451721472 in words is "four hundred fifty-one million, seven hundred twenty-one thousand, four hundred seventy-two".