512261 has 4 divisors (see below), whose sum is σ = 542412. Its totient is φ = 482112.

The previous prime is 512251. The next prime is 512269. The reversal of 512261 is 162215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162215 = 5 ⋅32443.

It can be written as a sum of positive squares in 2 ways, for example, as 280900 + 231361 = 530^2 + 481^2 .

It is a cyclic number.

It is not a de Polignac number, because 512261 - 2¹⁰ = 511237 is a prime.

It is a super-2 number, since 2×512261² = 524822664242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 30133 = 512261 / (5 + 1 + 2 + 2 + 6 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512269) 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, 15050 + ... + 15083.

It is an arithmetic number, because the mean of its divisors is an integer number (135603).

2⁵¹²²⁶¹ is an apocalyptic number.

It is an amenable number.

512261 is a deficient number, since it is larger than the sum of its proper divisors (30151).

512261 is a wasteful number, since it uses less digits than its factorization.

512261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30150.

The product of its digits is 120, while the sum is 17.

The square root of 512261 is about 715.7241088576. The cubic root of 512261 is about 80.0135914408.

Adding to 512261 its reverse (162215), we get a palindrome (674476).

The spelling of 512261 in words is "five hundred twelve thousand, two hundred sixty-one".