3643825 has 6 divisors (see below), whose sum is σ = 4518374. Its totient is φ = 2915040.

The previous prime is 3643819. The next prime is 3643841. The reversal of 3643825 is 5283463.

It can be written as a sum of positive squares in 3 ways, for example, as 173056 + 3470769 = 416^2 + 1863^2 .

It is not a de Polignac number, because 3643825 - 2¹¹ = 3641777 is a prime.

It is a Duffinian number.

3643825 is a lucky 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 5 ways as a sum of consecutive naturals, for example, 72852 + ... + 72901.

Almost surely, 2^3643825 is an apocalyptic number.

It is an amenable number.

3643825 is a deficient number, since it is larger than the sum of its proper divisors (874549).

3643825 is a wasteful number, since it uses less digits than its factorization.

3643825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145763 (or 145758 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 3643825 is about 1908.8805620049. The cubic root of 3643825 is about 153.8812966192.

It can be divided in two parts, 36438 and 25, that added together give a palindrome (36463).

The spelling of 3643825 in words is "three million, six hundred forty-three thousand, eight hundred twenty-five".