265142261 has 2 divisors, whose sum is σ = 265142262. Its totient is φ = 265142260.

The previous prime is 265142243. The next prime is 265142279. The reversal of 265142261 is 162241562.

It is a balanced prime because it is at equal distance from previous prime (265142243) and next prime (265142279).

It can be written as a sum of positive squares in only one way, i.e., 227859025 + 37283236 = 15095^2 + 6106^2 .

It is a cyclic number.

It is not a de Polignac number, because 265142261 - 2⁶ = 265142197 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265142221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132571130 + 132571131.

It is an arithmetic number, because the mean of its divisors is an integer number (132571131).

Almost surely, 2^265142261 is an apocalyptic number.

It is an amenable number.

265142261 is a deficient number, since it is larger than the sum of its proper divisors (1).

265142261 is an equidigital number, since it uses as much as digits as its factorization.

265142261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 265142261 is about 16283.1895217123. The cubic root of 265142261 is about 642.4307472785.

The spelling of 265142261 in words is "two hundred sixty-five million, one hundred forty-two thousand, two hundred sixty-one".