3971105 has 4 divisors (see below), whose sum is σ = 4765332. Its totient is φ = 3176880.

The previous prime is 3971087. The next prime is 3971117. The reversal of 3971105 is 5011793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5011793 = 1193 ⋅4201.

It can be written as a sum of positive squares in 2 ways, for example, as 2226064 + 1745041 = 1492^2 + 1321^2 .

It is not a de Polignac number, because 3971105 - 2⁶ = 3971041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397106 + ... + 397115.

It is an arithmetic number, because the mean of its divisors is an integer number (1191333).

Almost surely, 2^3971105 is an apocalyptic number.

It is an amenable number.

3971105 is a deficient number, since it is larger than the sum of its proper divisors (794227).

3971105 is an equidigital number, since it uses as much as digits as its factorization.

3971105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794226.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 3971105 is about 1992.7631570259. The cubic root of 3971105 is about 158.3569481552.

Adding to 3971105 its reverse (5011793), we get a palindrome (8982898).

The spelling of 3971105 in words is "three million, nine hundred seventy-one thousand, one hundred five".