4021105 has 16 divisors (see below), whose sum is σ = 5318784. Its totient is φ = 2894080.

The previous prime is 4021099. The next prime is 4021151. The reversal of 4021105 is 5011204.

4021105 = T₆₄ + T₆₅ + ... + T₂₈₉.

It is not a de Polignac number, because 4021105 - 2³ = 4021097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5892 + ... + 6538.

It is an arithmetic number, because the mean of its divisors is an integer number (332424).

Almost surely, 2^4021105 is an apocalyptic number.

It is an amenable number.

4021105 is a deficient number, since it is larger than the sum of its proper divisors (1297679).

4021105 is a wasteful number, since it uses less digits than its factorization.

4021105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776.

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

The square root of 4021105 is about 2005.2693085967. The cubic root of 4021105 is about 159.0187997759.

Adding to 4021105 its reverse (5011204), we get a palindrome (9032309).

Subtracting 4021105 from its reverse (5011204), we obtain a palindrome (990099).

The spelling of 4021105 in words is "four million, twenty-one thousand, one hundred five".