387215 has 8 divisors (see below), whose sum is σ = 475728. Its totient is φ = 302400.

The previous prime is 387203. The next prime is 387227. The reversal of 387215 is 512783.

It is an interprime number because it is at equal distance from previous prime (387203) and next prime (387227).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 387215 - 2⁴ = 387199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686 + ... + 1115.

It is an arithmetic number, because the mean of its divisors is an integer number (59466).

2³⁸⁷²¹⁵ is an apocalyptic number.

387215 is a deficient number, since it is larger than the sum of its proper divisors (88513).

387215 is a wasteful number, since it uses less digits than its factorization.

387215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849.

The product of its digits is 1680, while the sum is 26.

The square root of 387215 is about 622.2660202839. The cubic root of 387215 is about 72.8871089270.

Adding to 387215 its reverse (512783), we get a palindrome (899998).

It can be divided in two parts, 38 and 7215, that multiplied together give a triangular number (274170 = T₇₄₀).

The spelling of 387215 in words is "three hundred eighty-seven thousand, two hundred fifteen".