387081 has 12 divisors (see below), whose sum is σ = 573300. Its totient is φ = 251520.

The previous prime is 387077. The next prime is 387083. The reversal of 387081 is 180783.

387081 = 24² + 25² + ... + 105².

It can be written as a sum of positive squares in 2 ways, for example, as 176400 + 210681 = 420^2 + 459^2 .

It is not a de Polignac number, because 387081 - 2² = 387077 is a prime.

It is a super-2 number, since 2×387081² = 299663401122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (387083) 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, 156 + ... + 893.

It is an arithmetic number, because the mean of its divisors is an integer number (47775).

2³⁸⁷⁰⁸¹ is an apocalyptic number.

It is an amenable number.

387081 is a deficient number, since it is larger than the sum of its proper divisors (186219).

387081 is a wasteful number, since it uses less digits than its factorization.

387081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 387081 is about 622.1583399746. The cubic root of 387081 is about 72.8787001623.

The spelling of 387081 in words is "three hundred eighty-seven thousand, eighty-one".