452621921 has 2 divisors, whose sum is σ = 452621922. Its totient is φ = 452621920.

The previous prime is 452621867. The next prime is 452621927. The reversal of 452621921 is 129126254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280093696 + 172528225 = 16736^2 + 13135^2 .

It is a cyclic number.

It is not a de Polignac number, because 452621921 - 2¹⁰ = 452620897 is a prime.

It is not a weakly prime, because it can be changed into another prime (452621927) by changing a digit.

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, 226310960 + 226310961.

It is an arithmetic number, because the mean of its divisors is an integer number (226310961).

Almost surely, 2^452621921 is an apocalyptic number.

It is an amenable number.

452621921 is a deficient number, since it is larger than the sum of its proper divisors (1).

452621921 is an equidigital number, since it uses as much as digits as its factorization.

452621921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 452621921 is about 21274.9129492931. The cubic root of 452621921 is about 767.7948495601.

The spelling of 452621921 in words is "four hundred fifty-two million, six hundred twenty-one thousand, nine hundred twenty-one".