264716261 has 2 divisors, whose sum is σ = 264716262. Its totient is φ = 264716260.

The previous prime is 264716233. The next prime is 264716273. The reversal of 264716261 is 162617462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259403236 + 5313025 = 16106^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 264716261 - 2¹⁸ = 264454117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264706261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132358130 + 132358131.

It is an arithmetic number, because the mean of its divisors is an integer number (132358131).

Almost surely, 2^264716261 is an apocalyptic number.

It is an amenable number.

264716261 is a deficient number, since it is larger than the sum of its proper divisors (1).

264716261 is an equidigital number, since it uses as much as digits as its factorization.

264716261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 264716261 is about 16270.1032879327. The cubic root of 264716261 is about 642.0865016417.

The spelling of 264716261 in words is "two hundred sixty-four million, seven hundred sixteen thousand, two hundred sixty-one".