420550101 has 24 divisors (see below), whose sum is σ = 641921280. Its totient is φ = 264771936.

The previous prime is 420550093. The next prime is 420550121. The reversal of 420550101 is 101055024.

It is not a de Polignac number, because 420550101 - 2³ = 420550093 is a prime.

It is a super-2 number, since 2×420550101² = 353724774902220402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420550121) 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 23 ways as a sum of consecutive naturals, for example, 3495 + ... + 29211.

It is an arithmetic number, because the mean of its divisors is an integer number (26746720).

Almost surely, 2^420550101 is an apocalyptic number.

It is an amenable number.

420550101 is a deficient number, since it is larger than the sum of its proper divisors (221371179).

420550101 is a wasteful number, since it uses less digits than its factorization.

420550101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25825 (or 25822 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 420550101 is about 20507.3182303294. The cubic root of 420550101 is about 749.2140513340.

The spelling of 420550101 in words is "four hundred twenty million, five hundred fifty thousand, one hundred one".