512109 has 16 divisors (see below), whose sum is σ = 817600. Its totient is φ = 314928.

The previous prime is 512101. The next prime is 512137. The reversal of 512109 is 901215.

It is not a de Polignac number, because 512109 - 2³ = 512101 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 512091 and 512100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512101) 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 15 ways as a sum of consecutive naturals, for example, 379 + ... + 1080.

It is an arithmetic number, because the mean of its divisors is an integer number (51100).

2⁵¹²¹⁰⁹ is an apocalyptic number.

It is an amenable number.

512109 is a deficient number, since it is larger than the sum of its proper divisors (305491).

512109 is a wasteful number, since it uses less digits than its factorization.

512109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481 (or 1475 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 512109 is about 715.6179148121. The cubic root of 512109 is about 80.0056766805.

The spelling of 512109 in words is "five hundred twelve thousand, one hundred nine".