451021045 has 8 divisors (see below), whose sum is σ = 542033496. Its totient is φ = 360278016.

The previous prime is 451021037. The next prime is 451021057. The reversal of 451021045 is 540120154.

It can be written as a sum of positive squares in 4 ways, for example, as 31877316 + 419143729 = 5646^2 + 20473^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 451021045 - 2³ = 451021037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63652 + ... + 70381.

It is an arithmetic number, because the mean of its divisors is an integer number (67754187).

Almost surely, 2^451021045 is an apocalyptic number.

It is an amenable number.

451021045 is a deficient number, since it is larger than the sum of its proper divisors (91012451).

451021045 is a wasteful number, since it uses less digits than its factorization.

451021045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134711.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 451021045 is about 21237.2560609887. The cubic root of 451021045 is about 766.8885771190. Note that the first 3 decimals are identical.

Adding to 451021045 its reverse (540120154), we get a palindrome (991141199).

The spelling of 451021045 in words is "four hundred fifty-one million, twenty-one thousand, forty-five".