512655 has 32 divisors (see below), whose sum is σ = 967680. Its totient is φ = 228480.

The previous prime is 512641. The next prime is 512657. The reversal of 512655 is 556215.

It is a Cunningham number, because it is equal to 716²-1.

It is not a de Polignac number, because 512655 - 2⁶ = 512591 is a prime.

512655 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2026 + ... + 2264.

It is an arithmetic number, because the mean of its divisors is an integer number (30240).

2⁵¹²⁶⁵⁵ is an apocalyptic number.

512655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

512655 is a deficient number, since it is larger than the sum of its proper divisors (455025).

512655 is a wasteful number, since it uses less digits than its factorization.

512655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271.

The product of its digits is 1500, while the sum is 24.

The square root of 512655 is about 715.9993016756. Note that the first 3 decimals coincide. The cubic root of 512655 is about 80.0341000461.

The spelling of 512655 in words is "five hundred twelve thousand, six hundred fifty-five".