3642005 has 8 divisors (see below), whose sum is σ = 4442424. Its totient is φ = 2865600.

The previous prime is 3641999. The next prime is 3642019. The reversal of 3642005 is 5002463.

It can be written as a sum of positive squares in 4 ways, for example, as 39601 + 3602404 = 199^2 + 1898^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3642005 - 2¹⁴ = 3625621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5666 + ... + 6275.

It is an arithmetic number, because the mean of its divisors is an integer number (555303).

Almost surely, 2^3642005 is an apocalyptic number.

It is an amenable number.

3642005 is a deficient number, since it is larger than the sum of its proper divisors (800419).

3642005 is a wasteful number, since it uses less digits than its factorization.

3642005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12007.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 3642005 is about 1908.4037832702. The cubic root of 3642005 is about 153.8556723918.

Adding to 3642005 its reverse (5002463), we get a palindrome (8644468).

The spelling of 3642005 in words is "three million, six hundred forty-two thousand, five".