420320453 has 8 divisors (see below), whose sum is σ = 480511872. Its totient is φ = 360165456.

The previous prime is 420320449. The next prime is 420320471. The reversal of 420320453 is 354023024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420320453 - 2² = 420320449 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 (420320473) 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 7 ways as a sum of consecutive naturals, for example, 23351 + ... + 37227.

It is an arithmetic number, because the mean of its divisors is an integer number (60063984).

Almost surely, 2^420320453 is an apocalyptic number.

It is an amenable number.

420320453 is a deficient number, since it is larger than the sum of its proper divisors (60191419).

420320453 is a wasteful number, since it uses less digits than its factorization.

420320453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18211.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 420320453 is about 20501.7182938406. The cubic root of 420320453 is about 749.0776531296.

Adding to 420320453 its reverse (354023024), we get a palindrome (774343477).

The spelling of 420320453 in words is "four hundred twenty million, three hundred twenty thousand, four hundred fifty-three".