420001105 has 4 divisors (see below), whose sum is σ = 504001332. Its totient is φ = 336000880.

The previous prime is 420001103. The next prime is 420001123. The reversal of 420001105 is 501100024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 111682624 + 308318481 = 10568^2 + 17559^2 .

It is not a de Polignac number, because 420001105 - 2¹ = 420001103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420001103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42000106 + ... + 42000115.

It is an arithmetic number, because the mean of its divisors is an integer number (126000333).

Almost surely, 2^420001105 is an apocalyptic number.

It is an amenable number.

420001105 is a deficient number, since it is larger than the sum of its proper divisors (84000227).

420001105 is an equidigital number, since it uses as much as digits as its factorization.

420001105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84000226.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 420001105 is about 20493.9284911410. The cubic root of 420001105 is about 748.8878954835.

Adding to 420001105 its reverse (501100024), we get a palindrome (921101129).

The spelling of 420001105 in words is "four hundred twenty million, one thousand, one hundred five".