265004161 has 2 divisors, whose sum is σ = 265004162. Its totient is φ = 265004160.

The previous prime is 265004123. The next prime is 265004167. The reversal of 265004161 is 161400562.

265004161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221444161 + 43560000 = 14881^2 + 6600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265004161 is a prime.

It is not a weakly prime, because it can be changed into another prime (265004167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132502080 + 132502081.

It is an arithmetic number, because the mean of its divisors is an integer number (132502081).

Almost surely, 2^265004161 is an apocalyptic number.

It is an amenable number.

265004161 is a deficient number, since it is larger than the sum of its proper divisors (1).

265004161 is an equidigital number, since it uses as much as digits as its factorization.

265004161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 265004161 is about 16278.9483996971. The cubic root of 265004161 is about 642.3191906955.

The spelling of 265004161 in words is "two hundred sixty-five million, four thousand, one hundred sixty-one".