261276265 has 8 divisors (see below), whose sum is σ = 314085960. Its totient is φ = 208651392.

The previous prime is 261276263. The next prime is 261276269. The reversal of 261276265 is 562672162.

261276265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1369 + 261274896 = 37^2 + 16164^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261276265 - 2¹ = 261276263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261276263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43074 + ... + 48763.

It is an arithmetic number, because the mean of its divisors is an integer number (39260745).

Almost surely, 2^261276265 is an apocalyptic number.

It is an amenable number.

261276265 is a deficient number, since it is larger than the sum of its proper divisors (52809695).

261276265 is an equidigital number, since it uses as much as digits as its factorization.

261276265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92411.

The product of its digits is 60480, while the sum is 37.

The square root of 261276265 is about 16164.0423471358. The cubic root of 261276265 is about 639.2930548438.

The spelling of 261276265 in words is "two hundred sixty-one million, two hundred seventy-six thousand, two hundred sixty-five".