1000421105 has 4 divisors (see below), whose sum is σ = 1200505332. Its totient is φ = 800336880.

The previous prime is 1000421099. The next prime is 1000421129. The reversal of 1000421105 is 5011240001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5011240001 = 11833 ⋅423497.

It can be written as a sum of positive squares in 2 ways, for example, as 677248576 + 323172529 = 26024^2 + 17977^2 .

It is not a de Polignac number, because 1000421105 - 2⁴ = 1000421089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000421105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100042106 + ... + 100042115.

It is an arithmetic number, because the mean of its divisors is an integer number (300126333).

Almost surely, 2^1000421105 is an apocalyptic number.

It is an amenable number.

1000421105 is a deficient number, since it is larger than the sum of its proper divisors (200084227).

1000421105 is an equidigital number, since it uses as much as digits as its factorization.

1000421105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200084226.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1000421105 is about 31629.4341555457. The cubic root of 1000421105 is about 1000.1403486347.

Adding to 1000421105 its reverse (5011240001), we get a palindrome (6011661106).

The spelling of 1000421105 in words is "one billion, four hundred twenty-one thousand, one hundred five".