3855715 has 4 divisors (see below), whose sum is σ = 4626864. Its totient is φ = 3084568.

The previous prime is 3855703. The next prime is 3855757. The reversal of 3855715 is 5175583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5175583 = 7 ⋅739369.

It is a cyclic number.

It is not a de Polignac number, because 3855715 - 2¹⁵ = 3822947 is a prime.

It is a super-2 number, since 2×3855715² = 29733076322450, which contains 22 as substring.

It is a Duffinian number.

3855715 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 3 ways as a sum of consecutive naturals, for example, 385567 + ... + 385576.

It is an arithmetic number, because the mean of its divisors is an integer number (1156716).

Almost surely, 2^3855715 is an apocalyptic number.

3855715 is a deficient number, since it is larger than the sum of its proper divisors (771149).

3855715 is an equidigital number, since it uses as much as digits as its factorization.

3855715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771148.

The product of its digits is 21000, while the sum is 34.

The square root of 3855715 is about 1963.5974638403. The cubic root of 3855715 is about 156.8080334588.

The spelling of 3855715 in words is "three million, eight hundred fifty-five thousand, seven hundred fifteen".