511867 has 2 divisors, whose sum is σ = 511868. Its totient is φ = 511866.

The previous prime is 511859. The next prime is 511873. The reversal of 511867 is 768115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 511867 - 2³ = 511859 is a prime.

It is not a weakly prime, because it can be changed into another prime (511897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255933 + 255934.

It is an arithmetic number, because the mean of its divisors is an integer number (255934).

2⁵¹¹⁸⁶⁷ is an apocalyptic number.

511867 is a deficient number, since it is larger than the sum of its proper divisors (1).

511867 is an equidigital number, since it uses as much as digits as its factorization.

511867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 28.

The square root of 511867 is about 715.4488101884. The cubic root of 511867 is about 79.9930723168.

It can be divided in two parts, 511 and 867, that added together give a triangular number (1378 = T₅₂).

The spelling of 511867 in words is "five hundred eleven thousand, eight hundred sixty-seven".