3997005 has 16 divisors (see below), whose sum is σ = 6478080. Its totient is φ = 2104128.

The previous prime is 3997003. The next prime is 3997039. The reversal of 3997005 is 5007993.

It is not a de Polignac number, because 3997005 - 2¹ = 3997003 is a prime.

3997005 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502 + ... + 2871.

It is an arithmetic number, because the mean of its divisors is an integer number (404880).

Almost surely, 2^3997005 is an apocalyptic number.

It is an amenable number.

3997005 is a deficient number, since it is larger than the sum of its proper divisors (2481075).

3997005 is a wasteful number, since it uses less digits than its factorization.

3997005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3460.

The product of its (nonzero) digits is 8505, while the sum is 33.

The square root of 3997005 is about 1999.2511097909. The cubic root of 3997005 is about 158.7004764199.

The spelling of 3997005 in words is "three million, nine hundred ninety-seven thousand, five".