420534451 has 4 divisors (see below), whose sum is σ = 420788992. Its totient is φ = 420279912.

The previous prime is 420534397. The next prime is 420534463. The reversal of 420534451 is 154435024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420534451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420531451) 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, 124776 + ... + 128101.

It is an arithmetic number, because the mean of its divisors is an integer number (105197248).

Almost surely, 2^420534451 is an apocalyptic number.

420534451 is a deficient number, since it is larger than the sum of its proper divisors (254541).

420534451 is a wasteful number, since it uses less digits than its factorization.

420534451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254540.

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

The square root of 420534451 is about 20506.9366556782. The cubic root of 420534451 is about 749.2047576768.

Adding to 420534451 its reverse (154435024), we get a palindrome (574969475).

The spelling of 420534451 in words is "four hundred twenty million, five hundred thirty-four thousand, four hundred fifty-one".