264755261 has 4 divisors (see below), whose sum is σ = 265446912. Its totient is φ = 264063612.

The previous prime is 264755251. The next prime is 264755339. The reversal of 264755261 is 162557462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162557462 = 2 ⋅81278731.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264755261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264755201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345251 + ... + 346016.

It is an arithmetic number, because the mean of its divisors is an integer number (66361728).

Almost surely, 2^264755261 is an apocalyptic number.

It is an amenable number.

264755261 is a deficient number, since it is larger than the sum of its proper divisors (691651).

264755261 is an equidigital number, since it uses as much as digits as its factorization.

264755261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691650.

The product of its digits is 100800, while the sum is 38.

The square root of 264755261 is about 16271.3017610762. The cubic root of 264755261 is about 642.1180324385.

The spelling of 264755261 in words is "two hundred sixty-four million, seven hundred fifty-five thousand, two hundred sixty-one".