261244265 has 8 divisors (see below), whose sum is σ = 313579968. Its totient is φ = 208937520.

The previous prime is 261244213. The next prime is 261244289. The reversal of 261244265 is 562442162.

261244265 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 not a de Polignac number, because 261244265 - 2²⁶ = 194135401 is a prime.

It is a Duffinian 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, 30620 + ... + 38210.

It is an arithmetic number, because the mean of its divisors is an integer number (39197496).

Almost surely, 2^261244265 is an apocalyptic number.

It is an amenable number.

261244265 is a deficient number, since it is larger than the sum of its proper divisors (52335703).

261244265 is an equidigital number, since it uses as much as digits as its factorization.

261244265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14479.

The product of its digits is 23040, while the sum is 32.

The square root of 261244265 is about 16163.0524654225. The cubic root of 261244265 is about 639.2669544848.

The spelling of 261244265 in words is "two hundred sixty-one million, two hundred forty-four thousand, two hundred sixty-five".