451128407 has 4 divisors (see below), whose sum is σ = 451574760. Its totient is φ = 450682056.

The previous prime is 451128389. The next prime is 451128413. The reversal of 451128407 is 704821154.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 451128407 - 2²⁰ = 450079831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451128497) 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, 221657 + ... + 223682.

It is an arithmetic number, because the mean of its divisors is an integer number (112893690).

Almost surely, 2^451128407 is an apocalyptic number.

451128407 is a deficient number, since it is larger than the sum of its proper divisors (446353).

451128407 is a wasteful number, since it uses less digits than its factorization.

451128407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446352.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 451128407 is about 21239.7835911763. The cubic root of 451128407 is about 766.9494228823.

The spelling of 451128407 in words is "four hundred fifty-one million, one hundred twenty-eight thousand, four hundred seven".