3943105 has 4 divisors (see below), whose sum is σ = 4731732. Its totient is φ = 3154480.

The previous prime is 3943103. The next prime is 3943109. The reversal of 3943105 is 5013493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5013493 = 373 ⋅13441.

It can be written as a sum of positive squares in 2 ways, for example, as 1620529 + 2322576 = 1273^2 + 1524^2 .

It is not a de Polignac number, because 3943105 - 2¹ = 3943103 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 3943105.

It is not an unprimeable number, because it can be changed into a prime (3943103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394306 + ... + 394315.

It is an arithmetic number, because the mean of its divisors is an integer number (1182933).

Almost surely, 2^3943105 is an apocalyptic number.

It is an amenable number.

3943105 is a deficient number, since it is larger than the sum of its proper divisors (788627).

3943105 is an equidigital number, since it uses as much as digits as its factorization.

3943105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788626.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 3943105 is about 1985.7253082942. The cubic root of 3943105 is about 157.9838818146.

Adding to 3943105 its reverse (5013493), we get a palindrome (8956598).

The spelling of 3943105 in words is "three million, nine hundred forty-three thousand, one hundred five".