451921012 has 6 divisors (see below), whose sum is σ = 790861778. Its totient is φ = 225960504.

The previous prime is 451920971. The next prime is 451921021. The reversal of 451921012 is 210129154.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 364199056 + 87721956 = 19084^2 + 9366^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 56490123 + ... + 56490130.

Almost surely, 2^451921012 is an apocalyptic number.

It is an amenable number.

451921012 is a deficient number, since it is larger than the sum of its proper divisors (338940766).

451921012 is a wasteful number, since it uses less digits than its factorization.

451921012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112980257 (or 112980255 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 451921012 is about 21258.4339028067. The cubic root of 451921012 is about 767.3983211544.

The spelling of 451921012 in words is "four hundred fifty-one million, nine hundred twenty-one thousand, twelve".