512643 has 4 divisors (see below), whose sum is σ = 683528. Its totient is φ = 341760.

The previous prime is 512641. The next prime is 512657. The reversal of 512643 is 346215.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 512643 - 2¹ = 512641 is a prime.

It is a D-number.

It is a Duffinian number.

512643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (512641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85438 + ... + 85443.

It is an arithmetic number, because the mean of its divisors is an integer number (170882).

2⁵¹²⁶⁴³ is an apocalyptic number.

512643 is a deficient number, since it is larger than the sum of its proper divisors (170885).

512643 is a wasteful number, since it uses less digits than its factorization.

512643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170884.

The product of its digits is 720, while the sum is 21.

The square root of 512643 is about 715.9909217302. The cubic root of 512643 is about 80.0334755737.

Adding to 512643 its reverse (346215), we get a palindrome (858858).

The spelling of 512643 in words is "five hundred twelve thousand, six hundred forty-three".