452944721 has 4 divisors (see below), whose sum is σ = 453013092. Its totient is φ = 452876352.

The previous prime is 452944697. The next prime is 452944729. The reversal of 452944721 is 127449254.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127449254 = 2 ⋅63724627.

It can be written as a sum of positive squares in 2 ways, for example, as 42315025 + 410629696 = 6505^2 + 20264^2 .

It is a cyclic number.

It is not a de Polignac number, because 452944721 - 2¹⁸ = 452682577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (452944729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23036 + ... + 37901.

It is an arithmetic number, because the mean of its divisors is an integer number (113253273).

Almost surely, 2^452944721 is an apocalyptic number.

It is an amenable number.

452944721 is a deficient number, since it is larger than the sum of its proper divisors (68371).

452944721 is an equidigital number, since it uses as much as digits as its factorization.

452944721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68370.

The product of its digits is 80640, while the sum is 38.

The square root of 452944721 is about 21282.4979971807. The cubic root of 452944721 is about 767.9773309869.

The spelling of 452944721 in words is "four hundred fifty-two million, nine hundred forty-four thousand, seven hundred twenty-one".