165026129 has 2 divisors, whose sum is σ = 165026130. Its totient is φ = 165026128.

The previous prime is 165026119. The next prime is 165026143. The reversal of 165026129 is 921620561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127080529 + 37945600 = 11273^2 + 6160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165026129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 165026095 and 165026104.

It is not a weakly prime, because it can be changed into another prime (165026119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82513064 + 82513065.

It is an arithmetic number, because the mean of its divisors is an integer number (82513065).

Almost surely, 2^165026129 is an apocalyptic number.

It is an amenable number.

165026129 is a deficient number, since it is larger than the sum of its proper divisors (1).

165026129 is an equidigital number, since it uses as much as digits as its factorization.

165026129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 165026129 is about 12846.2496083487. The cubic root of 165026129 is about 548.5096057374.

The spelling of 165026129 in words is "one hundred sixty-five million, twenty-six thousand, one hundred twenty-nine".