512881 has 4 divisors (see below), whose sum is σ = 522612. Its totient is φ = 503152.

The previous prime is 512849. The next prime is 512891. The reversal of 512881 is 188215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188215 = 5 ⋅37643.

It can be written as a sum of positive squares in 2 ways, for example, as 360000 + 152881 = 600^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 512881 - 2⁵ = 512849 is a prime.

It is a super-2 number, since 2×512881² = 526093840322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512821) 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, 4786 + ... + 4891.

It is an arithmetic number, because the mean of its divisors is an integer number (130653).

2⁵¹²⁸⁸¹ is an apocalyptic number.

It is an amenable number.

512881 is a deficient number, since it is larger than the sum of its proper divisors (9731).

512881 is an equidigital number, since it uses as much as digits as its factorization.

512881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9730.

The product of its digits is 640, while the sum is 25.

The square root of 512881 is about 716.1571056689. The cubic root of 512881 is about 80.0458591234.

The spelling of 512881 in words is "five hundred twelve thousand, eight hundred eighty-one".