387851 has 4 divisors (see below), whose sum is σ = 390000. Its totient is φ = 385704.

The previous prime is 387839. The next prime is 387853. The reversal of 387851 is 158783.

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 387851 - 2¹⁸ = 125707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387853) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 776 + ... + 1173.

It is an arithmetic number, because the mean of its divisors is an integer number (97500).

2³⁸⁷⁸⁵¹ is an apocalyptic number.

387851 is a deficient number, since it is larger than the sum of its proper divisors (2149).

387851 is a wasteful number, since it uses less digits than its factorization.

387851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148.

The product of its digits is 6720, while the sum is 32.

The square root of 387851 is about 622.7768460693. The cubic root of 387851 is about 72.9269927508.

The spelling of 387851 in words is "three hundred eighty-seven thousand, eight hundred fifty-one".