387565 has 4 divisors (see below), whose sum is σ = 465084. Its totient is φ = 310048.

The previous prime is 387551. The next prime is 387577. The reversal of 387565 is 565783.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565783 = 293 ⋅1931.

It can be written as a sum of positive squares in 2 ways, for example, as 276676 + 110889 = 526^2 + 333^2 .

It is a cyclic number.

It is not a de Polignac number, because 387565 - 2⁷ = 387437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 387565.

It is a congruent number.

It is an unprimeable number.

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, 38752 + ... + 38761.

It is an arithmetic number, because the mean of its divisors is an integer number (116271).

2³⁸⁷⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

387565 is a deficient number, since it is larger than the sum of its proper divisors (77519).

387565 is an equidigital number, since it uses as much as digits as its factorization.

387565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77518.

The product of its digits is 25200, while the sum is 34.

The square root of 387565 is about 622.5471869666. The cubic root of 387565 is about 72.9090629713.

The spelling of 387565 in words is "three hundred eighty-seven thousand, five hundred sixty-five".