3801605 has 4 divisors (see below), whose sum is σ = 4561932. Its totient is φ = 3041280.

The previous prime is 3801599. The next prime is 3801617. The reversal of 3801605 is 5061083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5061083 = 149 ⋅33967.

It can be written as a sum of positive squares in 2 ways, for example, as 586756 + 3214849 = 766^2 + 1793^2 .

It is not a de Polignac number, because 3801605 - 2⁶ = 3801541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380156 + ... + 380165.

It is an arithmetic number, because the mean of its divisors is an integer number (1140483).

Almost surely, 2^3801605 is an apocalyptic number.

It is an amenable number.

3801605 is a deficient number, since it is larger than the sum of its proper divisors (760327).

3801605 is an equidigital number, since it uses as much as digits as its factorization.

3801605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760326.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 3801605 is about 1949.7704993152. The cubic root of 3801605 is about 156.0710420455.

Adding to 3801605 its reverse (5061083), we get a palindrome (8862688).

The spelling of 3801605 in words is "three million, eight hundred one thousand, six hundred five".