420550417 has 8 divisors (see below), whose sum is σ = 486713600. Its totient is φ = 355908384.

The previous prime is 420550411. The next prime is 420550421. The reversal of 420550417 is 714055024.

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

It is a cyclic number.

It is not a de Polignac number, because 420550417 - 2¹⁹ = 420026129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420550411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379692 + ... + 380797.

It is an arithmetic number, because the mean of its divisors is an integer number (60839200).

Almost surely, 2^420550417 is an apocalyptic number.

It is an amenable number.

420550417 is a deficient number, since it is larger than the sum of its proper divisors (66163183).

420550417 is an equidigital number, since it uses as much as digits as its factorization.

420550417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760575.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 420550417 is about 20507.3259348946. The cubic root of 420550417 is about 749.2142389863.

The spelling of 420550417 in words is "four hundred twenty million, five hundred fifty thousand, four hundred seventeen".