3642805 has 4 divisors (see below), whose sum is σ = 4371372. Its totient is φ = 2914240.

The previous prime is 3642791. The next prime is 3642817. The reversal of 3642805 is 5082463.

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 956484 + 2686321 = 978^2 + 1639^2 .

It is not a de Polignac number, because 3642805 - 2⁷ = 3642677 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 3 ways as a sum of consecutive naturals, for example, 364276 + ... + 364285.

It is an arithmetic number, because the mean of its divisors is an integer number (1092843).

Almost surely, 2^3642805 is an apocalyptic number.

It is an amenable number.

3642805 is a deficient number, since it is larger than the sum of its proper divisors (728567).

3642805 is an equidigital number, since it uses as much as digits as its factorization.

3642805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728566.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 3642805 is about 1908.6133710105. The cubic root of 3642805 is about 153.8669368397.

The spelling of 3642805 in words is "three million, six hundred forty-two thousand, eight hundred five".