512540 has 36 divisors (see below), whose sum is σ = 1254456. Its totient is φ = 175392.

The previous prime is 512537. The next prime is 512543. The reversal of 512540 is 45215.

It is an interprime number because it is at equal distance from previous prime (512537) and next prime (512543).

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 512540.

It is not an unprimeable number, because it can be changed into a prime (512543) 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, 719 + ... + 1241.

It is an arithmetic number, because the mean of its divisors is an integer number (34846).

2⁵¹²⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 512540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (627228).

512540 is an abundant number, since it is smaller than the sum of its proper divisors (741916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

512540 is a wasteful number, since it uses less digits than its factorization.

512540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 512540 is about 715.9189898306. The cubic root of 512540 is about 80.0281151181.

Adding to 512540 its reverse (45215), we get a palindrome (557755).

The spelling of 512540 in words is "five hundred twelve thousand, five hundred forty".