4057505 has 4 divisors (see below), whose sum is σ = 4869012. Its totient is φ = 3246000.

The previous prime is 4057451. The next prime is 4057511. The reversal of 4057505 is 5057504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1002001 + 3055504 = 1001^2 + 1748^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4057505 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405746 + ... + 405755.

It is an arithmetic number, because the mean of its divisors is an integer number (1217253).

Almost surely, 2^4057505 is an apocalyptic number.

It is an amenable number.

4057505 is a deficient number, since it is larger than the sum of its proper divisors (811507).

4057505 is an equidigital number, since it uses as much as digits as its factorization.

4057505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811506.

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 4057505 is about 2014.3249489593. The cubic root of 4057505 is about 159.4971845299.

Subtracting 4057505 from its reverse (5057504), we obtain a palindrome (999999).

The spelling of 4057505 in words is "four million, fifty-seven thousand, five hundred five".