266129 has 2 divisors, whose sum is σ = 266130. Its totient is φ = 266128.

The previous prime is 266117. The next prime is 266137. The reversal of 266129 is 921662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250000 + 16129 = 500^2 + 127^2 .

It is a cyclic number.

It is not a de Polignac number, because 266129 - 2⁸ = 265873 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 266098 and 266107.

It is not a weakly prime, because it can be changed into another prime (266159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133064 + 133065.

It is an arithmetic number, because the mean of its divisors is an integer number (133065).

2²⁶⁶¹²⁹ is an apocalyptic number.

It is an amenable number.

266129 is a deficient number, since it is larger than the sum of its proper divisors (1).

266129 is an equidigital number, since it uses as much as digits as its factorization.

266129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 266129 is about 515.8769233063. The cubic root of 266129 is about 64.3226705790.

The spelling of 266129 in words is "two hundred sixty-six thousand, one hundred twenty-nine".