3865129 has 4 divisors (see below), whose sum is σ = 3882384. Its totient is φ = 3847876.

The previous prime is 3865123. The next prime is 3865133. The reversal of 3865129 is 9215683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3865129 - 2¹⁷ = 3734057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3865094 and 3865103.

It is not an unprimeable number, because it can be changed into a prime (3865123) 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 in 3 ways as a sum of consecutive naturals, for example, 8287 + ... + 8740.

It is an arithmetic number, because the mean of its divisors is an integer number (970596).

Almost surely, 2^3865129 is an apocalyptic number.

It is an amenable number.

3865129 is a deficient number, since it is larger than the sum of its proper divisors (17255).

3865129 is a wasteful number, since it uses less digits than its factorization.

3865129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17254.

The product of its digits is 12960, while the sum is 34.

The square root of 3865129 is about 1965.9931332535. The cubic root of 3865129 is about 156.9355490252.

The spelling of 3865129 in words is "three million, eight hundred sixty-five thousand, one hundred twenty-nine".