4012005 has 32 divisors (see below), whose sum is σ = 6946560. Its totient is φ = 1971200.

The previous prime is 4011991. The next prime is 4012013. The reversal of 4012005 is 5002104.

It is not a de Polignac number, because 4012005 - 2¹⁵ = 3979237 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9805 + ... + 10205.

It is an arithmetic number, because the mean of its divisors is an integer number (217080).

Almost surely, 2^4012005 is an apocalyptic number.

It is an amenable number.

4012005 is a deficient number, since it is larger than the sum of its proper divisors (2934555).

4012005 is a wasteful number, since it uses less digits than its factorization.

4012005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 4012005 is about 2002.9990014975. Note that the first 3 decimals coincide. The cubic root of 4012005 is about 158.8987528357.

Adding to 4012005 its reverse (5002104), we get a palindrome (9014109).

Subtracting 4012005 from its reverse (5002104), we obtain a palindrome (990099).

The spelling of 4012005 in words is "four million, twelve thousand, five".