387621 has 12 divisors (see below), whose sum is σ = 603148. Its totient is φ = 238464.

The previous prime is 387613. The next prime is 387623. The reversal of 387621 is 126783.

387621 is a `hidden beast` number, since 38 + 7 + 621 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 216225 + 171396 = 465^2 + 414^2 .

It is not a de Polignac number, because 387621 - 2³ = 387613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1540 + ... + 1773.

2³⁸⁷⁶²¹ is an apocalyptic number.

It is an amenable number.

387621 is a deficient number, since it is larger than the sum of its proper divisors (215527).

387621 is a wasteful number, since it uses less digits than its factorization.

387621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332 (or 3329 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 387621 is about 622.5921618524. The cubic root of 387621 is about 72.9125743917.

The spelling of 387621 in words is "three hundred eighty-seven thousand, six hundred twenty-one".