3865225 has 24 divisors (see below), whose sum is σ = 5902400. Its totient is φ = 2445120.

The previous prime is 3865187. The next prime is 3865229. The reversal of 3865225 is 5225683.

It is a happy number.

It is not a de Polignac number, because 3865225 - 2¹⁷ = 3734153 is a prime.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3865229) 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 23 ways as a sum of consecutive naturals, for example, 1426 + ... + 3124.

Almost surely, 2^3865225 is an apocalyptic number.

3865225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3865225 is a deficient number, since it is larger than the sum of its proper divisors (2037175).

3865225 is a wasteful number, since it uses less digits than its factorization.

3865225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729 (or 1724 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 3865225 is about 1966.0175482431. The cubic root of 3865225 is about 156.9368483081.

The spelling of 3865225 in words is "three million, eight hundred sixty-five thousand, two hundred twenty-five".