261959 has 2 divisors, whose sum is σ = 261960. Its totient is φ = 261958.

The previous prime is 261917. The next prime is 261971. The reversal of 261959 is 959162.

261959 is nontrivially palindromic in base 6.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261959 - 2¹² = 257863 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261959.

It is not a weakly prime, because it can be changed into another prime (261059) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130979 + 130980.

It is an arithmetic number, because the mean of its divisors is an integer number (130980).

2²⁶¹⁹⁵⁹ is an apocalyptic number.

261959 is a deficient number, since it is larger than the sum of its proper divisors (1).

261959 is an equidigital number, since it uses as much as digits as its factorization.

261959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 32.

The square root of 261959 is about 511.8193040517. The cubic root of 261959 is about 63.9849411185.

The spelling of 261959 in words is "two hundred sixty-one thousand, nine hundred fifty-nine".