265129 has 2 divisors, whose sum is σ = 265130. Its totient is φ = 265128.

The previous prime is 265123. The next prime is 265141. The reversal of 265129 is 921562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250000 + 15129 = 500^2 + 123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265129 is a prime.

265129 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (265123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132564 + 132565.

It is an arithmetic number, because the mean of its divisors is an integer number (132565).

2²⁶⁵¹²⁹ is an apocalyptic number.

It is an amenable number.

265129 is a deficient number, since it is larger than the sum of its proper divisors (1).

265129 is an equidigital number, since it uses as much as digits as its factorization.

265129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 25.

The square root of 265129 is about 514.9067876810. The cubic root of 265129 is about 64.2420036781.

The spelling of 265129 in words is "two hundred sixty-five thousand, one hundred twenty-nine".