420421775 has 12 divisors (see below), whose sum is σ = 524241000. Its totient is φ = 334454880.

The previous prime is 420421769. The next prime is 420421789. The reversal of 420421775 is 577124024.

It is not a de Polignac number, because 420421775 - 2¹⁸ = 420159631 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 42500 + ... + 51449.

It is an arithmetic number, because the mean of its divisors is an integer number (43686750).

Almost surely, 2^420421775 is an apocalyptic number.

420421775 is a deficient number, since it is larger than the sum of its proper divisors (103819225).

420421775 is a wasteful number, since it uses less digits than its factorization.

420421775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94138 (or 94133 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 420421775 is about 20504.1892061110. The cubic root of 420421775 is about 749.1378389137.

Adding to 420421775 its reverse (577124024), we get a palindrome (997545799).

The spelling of 420421775 in words is "four hundred twenty million, four hundred twenty-one thousand, seven hundred seventy-five".