453243421 has 2 divisors, whose sum is σ = 453243422. Its totient is φ = 453243420.

The previous prime is 453243389. The next prime is 453243463. The reversal of 453243421 is 124342354.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 452625625 + 617796 = 21275^2 + 786^2 .

It is a cyclic number.

It is not a de Polignac number, because 453243421 - 2⁵ = 453243389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 453243421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (453243491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226621710 + 226621711.

It is an arithmetic number, because the mean of its divisors is an integer number (226621711).

Almost surely, 2^453243421 is an apocalyptic number.

It is an amenable number.

453243421 is a deficient number, since it is larger than the sum of its proper divisors (1).

453243421 is an equidigital number, since it uses as much as digits as its factorization.

453243421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 28.

The square root of 453243421 is about 21289.5143439206. The cubic root of 453243421 is about 768.1461112750.

Adding to 453243421 its reverse (124342354), we get a palindrome (577585775).

The spelling of 453243421 in words is "four hundred fifty-three million, two hundred forty-three thousand, four hundred twenty-one".