387021 has 16 divisors (see below), whose sum is σ = 552960. Its totient is φ = 240240.

The previous prime is 387017. The next prime is 387031. The reversal of 387021 is 120783.

It is not a de Polignac number, because 387021 - 2² = 387017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387031) 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 15 ways as a sum of consecutive naturals, for example, 4860 + ... + 4938.

It is an arithmetic number, because the mean of its divisors is an integer number (34560).

2³⁸⁷⁰²¹ is an apocalyptic number.

It is an amenable number.

387021 is a deficient number, since it is larger than the sum of its proper divisors (165939).

387021 is a wasteful number, since it uses less digits than its factorization.

387021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 387021 is about 622.1101188696. The cubic root of 387021 is about 72.8749344148.

The spelling of 387021 in words is "three hundred eighty-seven thousand, twenty-one".