451852921 has 8 divisors (see below), whose sum is σ = 486781064. Its totient is φ = 416949120.

The previous prime is 451852909. The next prime is 451852937. The reversal of 451852921 is 129258154.

It can be written as a sum of positive squares in 4 ways, for example, as 17338896 + 434514025 = 4164^2 + 20845^2 .

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 451852921 - 2⁹ = 451852409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451852981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55981 + ... + 63541.

It is an arithmetic number, because the mean of its divisors is an integer number (60847633).

Almost surely, 2^451852921 is an apocalyptic number.

It is an amenable number.

451852921 is a deficient number, since it is larger than the sum of its proper divisors (34928143).

451852921 is a wasteful number, since it uses less digits than its factorization.

451852921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12171.

The product of its digits is 28800, while the sum is 37.

The square root of 451852921 is about 21256.8323369217. The cubic root of 451852921 is about 767.3597778822.

The spelling of 451852921 in words is "four hundred fifty-one million, eight hundred fifty-two thousand, nine hundred twenty-one".