3605731 has 4 divisors (see below), whose sum is σ = 3611952. Its totient is φ = 3599512.

The previous prime is 3605711. The next prime is 3605741. The reversal of 3605731 is 1375063.

It is a happy number.

3605731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 3605731 - 2¹⁵ = 3572963 is a prime.

It is a super-2 number, since 2×3605731² = 26002592088722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3605696 and 3605705.

It is not an unprimeable number, because it can be changed into a prime (3605711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2140 + ... + 3433.

It is an arithmetic number, because the mean of its divisors is an integer number (902988).

Almost surely, 2^3605731 is an apocalyptic number.

3605731 is a deficient number, since it is larger than the sum of its proper divisors (6221).

3605731 is an equidigital number, since it uses as much as digits as its factorization.

3605731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6220.

The product of its (nonzero) digits is 1890, while the sum is 25.

The square root of 3605731 is about 1898.8762466259. The cubic root of 3605731 is about 153.3431714965.

The spelling of 3605731 in words is "three million, six hundred five thousand, seven hundred thirty-one".