387129 has 8 divisors (see below), whose sum is σ = 528352. Its totient is φ = 252000.

The previous prime is 387109. The next prime is 387137. The reversal of 387129 is 921783.

It is a happy number.

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

It is not a de Polignac number, because 387129 - 2¹¹ = 385081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 387096 and 387105.

It is not an unprimeable number, because it can be changed into a prime (387109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372 + ... + 1629.

It is an arithmetic number, because the mean of its divisors is an integer number (66044).

2³⁸⁷¹²⁹ is an apocalyptic number.

It is an amenable number.

387129 is a deficient number, since it is larger than the sum of its proper divisors (141223).

387129 is a wasteful number, since it uses less digits than its factorization.

387129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047.

The product of its digits is 3024, while the sum is 30.

The square root of 387129 is about 622.1969141679. The cubic root of 387129 is about 72.8817124802.

The spelling of 387129 in words is "three hundred eighty-seven thousand, one hundred twenty-nine".