4012105 has 4 divisors (see below), whose sum is σ = 4814532. Its totient is φ = 3209680.

The previous prime is 4012103. The next prime is 4012109. The reversal of 4012105 is 5012104.

4012105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2782224 + 1229881 = 1668^2 + 1109^2 .

It is not a de Polignac number, because 4012105 - 2¹ = 4012103 is a prime.

It is an Ulam number.

It is a Duffinian number.

4012105 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4012103) 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 3 ways as a sum of consecutive naturals, for example, 401206 + ... + 401215.

It is an arithmetic number, because the mean of its divisors is an integer number (1203633).

Almost surely, 2^4012105 is an apocalyptic number.

It is an amenable number.

4012105 is a deficient number, since it is larger than the sum of its proper divisors (802427).

4012105 is an equidigital number, since it uses as much as digits as its factorization.

4012105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802426.

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

The square root of 4012105 is about 2003.0239639106. The cubic root of 4012105 is about 158.9000730188.

Adding to 4012105 its reverse (5012104), we get a palindrome (9024209).

Subtracting 4012105 from its reverse (5012104), we obtain a palindrome (999999).

The spelling of 4012105 in words is "four million, twelve thousand, one hundred five".