4047405 has 16 divisors (see below), whose sum is σ = 6614784. Its totient is φ = 2112320.

The previous prime is 4047383. The next prime is 4047409. The reversal of 4047405 is 5047404.

It is not a de Polignac number, because 4047405 - 2¹⁰ = 4046381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4047409) 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, 2166 + ... + 3575.

It is an arithmetic number, because the mean of its divisors is an integer number (413424).

Almost surely, 2^4047405 is an apocalyptic number.

It is an amenable number.

4047405 is a deficient number, since it is larger than the sum of its proper divisors (2567379).

4047405 is a wasteful number, since it uses less digits than its factorization.

4047405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 4047405 is about 2011.8163435065. The cubic root of 4047405 is about 159.3647336716.

Subtracting 4047405 from its reverse (5047404), we obtain a palindrome (999999).

The spelling of 4047405 in words is "four million, forty-seven thousand, four hundred five".