3865487 has 4 divisors (see below), whose sum is σ = 3903120. Its totient is φ = 3827856.

The previous prime is 3865481. The next prime is 3865513. The reversal of 3865487 is 7845683.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3865487 - 2⁸ = 3865231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18662 + ... + 18867.

It is an arithmetic number, because the mean of its divisors is an integer number (975780).

Almost surely, 2^3865487 is an apocalyptic number.

3865487 is a deficient number, since it is larger than the sum of its proper divisors (37633).

3865487 is a wasteful number, since it uses less digits than its factorization.

3865487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37632.

The product of its digits is 161280, while the sum is 41.

The square root of 3865487 is about 1966.0841792762. The cubic root of 3865487 is about 156.9403941582.

The spelling of 3865487 in words is "three million, eight hundred sixty-five thousand, four hundred eighty-seven".