512581261 has 2 divisors, whose sum is σ = 512581262. Its totient is φ = 512581260.

The previous prime is 512581241. The next prime is 512581319. The reversal of 512581261 is 162185215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 511031236 + 1550025 = 22606^2 + 1245^2 .

It is a cyclic number.

It is not a de Polignac number, because 512581261 - 2⁷ = 512581133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512581211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256290630 + 256290631.

It is an arithmetic number, because the mean of its divisors is an integer number (256290631).

Almost surely, 2^512581261 is an apocalyptic number.

It is an amenable number.

512581261 is a deficient number, since it is larger than the sum of its proper divisors (1).

512581261 is an equidigital number, since it uses as much as digits as its factorization.

512581261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 31.

The square root of 512581261 is about 22640.2575294540. The cubic root of 512581261 is about 800.3026256119.

The spelling of 512581261 in words is "five hundred twelve million, five hundred eighty-one thousand, two hundred sixty-one".