3855857 has 2 divisors, whose sum is σ = 3855858. Its totient is φ = 3855856.

The previous prime is 3855851. The next prime is 3855913. The reversal of 3855857 is 7585583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3500641 + 355216 = 1871^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 3855857 - 2⁶ = 3855793 is a prime.

It is not a weakly prime, because it can be changed into another prime (3855851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1927928 + 1927929.

It is an arithmetic number, because the mean of its divisors is an integer number (1927929).

Almost surely, 2^3855857 is an apocalyptic number.

It is an amenable number.

3855857 is a deficient number, since it is larger than the sum of its proper divisors (1).

3855857 is an equidigital number, since it uses as much as digits as its factorization.

3855857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168000, while the sum is 41.

The square root of 3855857 is about 1963.6336216311. The cubic root of 3855857 is about 156.8099584341.

It can be divided in two parts, 3855 and 857, that multiplied together give a triangular number (3303735 = T₂₅₇₀).

The spelling of 3855857 in words is "three million, eight hundred fifty-five thousand, eight hundred fifty-seven".