3865123 has 2 divisors, whose sum is σ = 3865124. Its totient is φ = 3865122.

The previous prime is 3865117. The next prime is 3865133. The reversal of 3865123 is 3215683.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3865123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3865091 and 3865100.

It is not a weakly prime, because it can be changed into another prime (3865133) by changing a digit.

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 as a sum of consecutive naturals, namely, 1932561 + 1932562.

It is an arithmetic number, because the mean of its divisors is an integer number (1932562).

Almost surely, 2^3865123 is an apocalyptic number.

3865123 is a deficient number, since it is larger than the sum of its proper divisors (1).

3865123 is an equidigital number, since it uses as much as digits as its factorization.

3865123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 3865123 is about 1965.9916073066. The cubic root of 3865123 is about 156.9354678193.

The spelling of 3865123 in words is "three million, eight hundred sixty-five thousand, one hundred twenty-three".