451945 has 16 divisors (see below), whose sum is σ = 619920. Its totient is φ = 313344.

The previous prime is 451939. The next prime is 451961. The reversal of 451945 is 549154.

It can be written as a sum of positive squares in 8 ways, for example, as 7056 + 444889 = 84^2 + 667^2 .

It is not a de Polignac number, because 451945 - 2³ = 451937 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 901 + ... + 1309.

It is an arithmetic number, because the mean of its divisors is an integer number (38745).

2⁴⁵¹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

451945 is a deficient number, since it is larger than the sum of its proper divisors (167975).

451945 is a wasteful number, since it uses less digits than its factorization.

451945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444.

The product of its digits is 3600, while the sum is 28.

The square root of 451945 is about 672.2685475314. The cubic root of 451945 is about 76.7411898767.

The spelling of 451945 in words is "four hundred fifty-one thousand, nine hundred forty-five".