451240321 has 4 divisors (see below), whose sum is σ = 515703232. Its totient is φ = 386777412.

The previous prime is 451240303. The next prime is 451240327. The reversal of 451240321 is 123042154.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123042154 = 2 ⋅61521077.

It is not a de Polignac number, because 451240321 - 2⁷ = 451240193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 451240292 and 451240301.

It is not an unprimeable number, because it can be changed into a prime (451240327) 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 3 ways as a sum of consecutive naturals, for example, 32231445 + ... + 32231458.

It is an arithmetic number, because the mean of its divisors is an integer number (128925808).

Almost surely, 2^451240321 is an apocalyptic number.

It is an amenable number.

451240321 is a deficient number, since it is larger than the sum of its proper divisors (64462911).

451240321 is an equidigital number, since it uses as much as digits as its factorization.

451240321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64462910.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 451240321 is about 21242.4179650058. The cubic root of 451240321 is about 767.0128381463.

Adding to 451240321 its reverse (123042154), we get a palindrome (574282475).

The spelling of 451240321 in words is "four hundred fifty-one million, two hundred forty thousand, three hundred twenty-one".