3642785 has 4 divisors (see below), whose sum is σ = 4371348. Its totient is φ = 2914224.

The previous prime is 3642739. The next prime is 3642791. The reversal of 3642785 is 5872463.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2676496 + 966289 = 1636^2 + 983^2 .

It is a cyclic number.

It is not a de Polignac number, because 3642785 - 2⁶ = 3642721 is a prime.

It is a Duffinian 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, 364274 + ... + 364283.

It is an arithmetic number, because the mean of its divisors is an integer number (1092837).

Almost surely, 2^3642785 is an apocalyptic number.

It is an amenable number.

3642785 is a deficient number, since it is larger than the sum of its proper divisors (728563).

3642785 is an equidigital number, since it uses as much as digits as its factorization.

3642785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728562.

The product of its digits is 40320, while the sum is 35.

The square root of 3642785 is about 1908.6081315975. The cubic root of 3642785 is about 153.8666552486.

The spelling of 3642785 in words is "three million, six hundred forty-two thousand, seven hundred eighty-five".