451121320 has 32 divisors (see below), whose sum is σ = 1093102920. Its totient is φ = 166567680.

The previous prime is 451121317. The next prime is 451121327. The reversal of 451121320 is 23121154.

It can be written as a sum of positive squares in 4 ways, for example, as 295221124 + 155900196 = 17182^2 + 12486^2 .

It is not an unprimeable number, because it can be changed into a prime (451121327) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 433251 + ... + 434290.

Almost surely, 2^451121320 is an apocalyptic number.

451121320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

451121320 is an abundant number, since it is smaller than the sum of its proper divisors (641981600).

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

451121320 is a wasteful number, since it uses less digits than its factorization.

451121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867565 (or 867561 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 451121320 is about 21239.6167573711. The cubic root of 451121320 is about 766.9454067316.

Adding to 451121320 its reverse (23121154), we get a palindrome (474242474).

It can be divided in two parts, 451 and 121320, that added together give a triangular number (121771 = T₄₉₃).

The spelling of 451121320 in words is "four hundred fifty-one million, one hundred twenty-one thousand, three hundred twenty".