451230921 has 6 divisors (see below), whose sum is σ = 651778010. Its totient is φ = 300820608.

The previous prime is 451230919. The next prime is 451230931. The reversal of 451230921 is 129032154.

It can be written as a sum of positive squares in only one way, i.e., 376166025 + 75064896 = 19395^2 + 8664^2 .

It is not a de Polignac number, because 451230921 - 2¹ = 451230919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451230931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25068376 + ... + 25068393.

Almost surely, 2^451230921 is an apocalyptic number.

It is an amenable number.

451230921 is a deficient number, since it is larger than the sum of its proper divisors (200547089).

451230921 is a wasteful number, since it uses less digits than its factorization.

451230921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50136775 (or 50136772 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 451230921 is about 21242.1967084386. The cubic root of 451230921 is about 767.0075121072.

The spelling of 451230921 in words is "four hundred fifty-one million, two hundred thirty thousand, nine hundred twenty-one".