421045453 has 4 divisors (see below), whose sum is σ = 443205760. Its totient is φ = 398885148.

The previous prime is 421045451. The next prime is 421045489. The reversal of 421045453 is 354540124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421045453 - 2¹ = 421045451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421045451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11080125 + ... + 11080162.

It is an arithmetic number, because the mean of its divisors is an integer number (110801440).

Almost surely, 2^421045453 is an apocalyptic number.

It is an amenable number.

421045453 is a deficient number, since it is larger than the sum of its proper divisors (22160307).

421045453 is a wasteful number, since it uses less digits than its factorization.

421045453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22160306.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 421045453 is about 20519.3921206258. The cubic root of 421045453 is about 749.5080940345.

Adding to 421045453 its reverse (354540124), we get a palindrome (775585577).

The spelling of 421045453 in words is "four hundred twenty-one million, forty-five thousand, four hundred fifty-three".