452321721 has 12 divisors (see below), whose sum is σ = 654011748. Its totient is φ = 301244064.

The previous prime is 452321677. The next prime is 452321743. The reversal of 452321721 is 127123254.

It can be written as a sum of positive squares in 2 ways, for example, as 291600 + 452030121 = 540^2 + 21261^2 .

It is not a de Polignac number, because 452321721 - 2⁷ = 452321593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (452321021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15690 + ... + 33923.

It is an arithmetic number, because the mean of its divisors is an integer number (54500979).

Almost surely, 2^452321721 is an apocalyptic number.

It is an amenable number.

452321721 is a deficient number, since it is larger than the sum of its proper divisors (201690027).

452321721 is a wasteful number, since it uses less digits than its factorization.

452321721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50632 (or 50629 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 452321721 is about 21267.8565210507. The cubic root of 452321721 is about 767.6250662159.

Adding to 452321721 its reverse (127123254), we get a palindrome (579444975).

It can be divided in two parts, 4523 and 21721, that added together give a square (26244 = 162²).

The spelling of 452321721 in words is "four hundred fifty-two million, three hundred twenty-one thousand, seven hundred twenty-one".