4020105 has 16 divisors (see below), whose sum is σ = 6511680. Its totient is φ = 2117568.

The previous prime is 4020031. The next prime is 4020119. The reversal of 4020105 is 5010204.

It is not a de Polignac number, because 4020105 - 2¹⁸ = 3757961 is a prime.

It is a super-2 number, since 2×4020105² = 32322488422050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 370 + ... + 2859.

It is an arithmetic number, because the mean of its divisors is an integer number (406980).

Almost surely, 2^4020105 is an apocalyptic number.

It is an amenable number.

4020105 is a deficient number, since it is larger than the sum of its proper divisors (2491575).

4020105 is a wasteful number, since it uses less digits than its factorization.

4020105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 4020105 is about 2005.0199500254. The cubic root of 4020105 is about 159.0056166680.

Adding to 4020105 its reverse (5010204), we get a palindrome (9030309).

Subtracting 4020105 from its reverse (5010204), we obtain a palindrome (990099).

The spelling of 4020105 in words is "four million, twenty thousand, one hundred five".