265961 has 2 divisors, whose sum is σ = 265962. Its totient is φ = 265960.

The previous prime is 265957. The next prime is 265987. The reversal of 265961 is 169562.

265961 is nontrivially palindromic in base 6.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 72361 = 440^2 + 269^2 .

It is a cyclic number.

It is not a de Polignac number, because 265961 - 2² = 265957 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 265961.

It is not a weakly prime, because it can be changed into another prime (265921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132980 + 132981.

It is an arithmetic number, because the mean of its divisors is an integer number (132981).

2²⁶⁵⁹⁶¹ is an apocalyptic number.

It is an amenable number.

265961 is a deficient number, since it is larger than the sum of its proper divisors (1).

265961 is an equidigital number, since it uses as much as digits as its factorization.

265961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 265961 is about 515.7140680649. The cubic root of 265961 is about 64.3091326790.

The spelling of 265961 in words is "two hundred sixty-five thousand, nine hundred sixty-one".