3642605 has 4 divisors (see below), whose sum is σ = 4371132. Its totient is φ = 2914080.

The previous prime is 3642581. The next prime is 3642619. The reversal of 3642605 is 5062463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5062463 = 7 ⋅723209.

It can be written as a sum of positive squares in 2 ways, for example, as 611524 + 3031081 = 782^2 + 1741^2 .

It is not a de Polignac number, because 3642605 - 2¹⁴ = 3626221 is a prime.

It is an Ulam number.

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 3 ways as a sum of consecutive naturals, for example, 364256 + ... + 364265.

It is an arithmetic number, because the mean of its divisors is an integer number (1092783).

Almost surely, 2^3642605 is an apocalyptic number.

It is an amenable number.

3642605 is a deficient number, since it is larger than the sum of its proper divisors (728527).

3642605 is an equidigital number, since it uses as much as digits as its factorization.

3642605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728526.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 3642605 is about 1908.5609762331. The cubic root of 3642605 is about 153.8641208824.

The spelling of 3642605 in words is "three million, six hundred forty-two thousand, six hundred five".