512409 has 8 divisors (see below), whose sum is σ = 689920. Its totient is φ = 338256.

The previous prime is 512389. The next prime is 512419. The reversal of 512409 is 904215.

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

It is not a de Polignac number, because 512409 - 2⁹ = 511897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512419) 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 7 ways as a sum of consecutive naturals, for example, 457 + ... + 1110.

It is an arithmetic number, because the mean of its divisors is an integer number (86240).

2⁵¹²⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

512409 is a deficient number, since it is larger than the sum of its proper divisors (177511).

512409 is a wasteful number, since it uses less digits than its factorization.

512409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 512409 is about 715.8274931853. The cubic root of 512409 is about 80.0212964136.

The spelling of 512409 in words is "five hundred twelve thousand, four hundred nine".