3943005 has 32 divisors (see below), whose sum is σ = 7188480. Its totient is φ = 1826880.

The previous prime is 3942989. The next prime is 3943007. The reversal of 3943005 is 5003493.

It is not a de Polignac number, because 3943005 - 2⁴ = 3942989 is a prime.

It is an Ulam number.

3943005 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3276 + ... + 4314.

It is an arithmetic number, because the mean of its divisors is an integer number (224640).

Almost surely, 2^3943005 is an apocalyptic number.

It is an amenable number.

3943005 is a deficient number, since it is larger than the sum of its proper divisors (3245475).

3943005 is a wasteful number, since it uses less digits than its factorization.

3943005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 3943005 is about 1985.7001284182. The cubic root of 3943005 is about 157.9825462748.

Adding to 3943005 its reverse (5003493), we get a palindrome (8946498).

The spelling of 3943005 in words is "three million, nine hundred forty-three thousand, five".