3857005 has 4 divisors (see below), whose sum is σ = 4628412. Its totient is φ = 3085600.

The previous prime is 3857003. The next prime is 3857023. The reversal of 3857005 is 5007583.

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 2802276 + 1054729 = 1674^2 + 1027^2 .

It is not a de Polignac number, because 3857005 - 2¹ = 3857003 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3857003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385696 + ... + 385705.

It is an arithmetic number, because the mean of its divisors is an integer number (1157103).

Almost surely, 2^3857005 is an apocalyptic number.

It is an amenable number.

3857005 is a deficient number, since it is larger than the sum of its proper divisors (771407).

3857005 is an equidigital number, since it uses as much as digits as its factorization.

3857005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771406.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 3857005 is about 1963.9259150997. The cubic root of 3857005 is about 156.8255191745.

The spelling of 3857005 in words is "three million, eight hundred fifty-seven thousand, five".