261270065 has 8 divisors (see below), whose sum is σ = 358313280. Its totient is φ = 179156592.

The previous prime is 261270049. The next prime is 261270089. The reversal of 261270065 is 560072162.

261270065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 261270065 - 2⁴ = 261270049 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3732395 + ... + 3732464.

It is an arithmetic number, because the mean of its divisors is an integer number (44789160).

Almost surely, 2^261270065 is an apocalyptic number.

It is an amenable number.

261270065 is a deficient number, since it is larger than the sum of its proper divisors (97043215).

261270065 is an equidigital number, since it uses as much as digits as its factorization.

261270065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7464871.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 261270065 is about 16163.8505622887. The cubic root of 261270065 is about 639.2879980657.

The spelling of 261270065 in words is "two hundred sixty-one million, two hundred seventy thousand, sixty-five".