512649 has 10 divisors (see below), whose sum is σ = 765930. Its totient is φ = 341712.

The previous prime is 512641. The next prime is 512657. The reversal of 512649 is 946215.

512649 is a `hidden beast` number, since 5 + 12 + 649 = 666.

It is an interprime number because it is at equal distance from previous prime (512641) and next prime (512657).

It can be written as a sum of positive squares in only one way, i.e., 480249 + 32400 = 693^2 + 180^2 .

It is not a de Polignac number, because 512649 - 2³ = 512641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 9 ways as a sum of consecutive naturals, for example, 3084 + ... + 3245.

It is an arithmetic number, because the mean of its divisors is an integer number (76593).

2⁵¹²⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

512649 is a deficient number, since it is larger than the sum of its proper divisors (253281).

512649 is an equidigital number, since it uses as much as digits as its factorization.

512649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6341 (or 6332 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 512649 is about 715.9951117152. The cubic root of 512649 is about 80.0337878111.

The spelling of 512649 in words is "five hundred twelve thousand, six hundred forty-nine".