261050265 has 24 divisors (see below), whose sum is σ = 517128768. Its totient is φ = 119337120.

The previous prime is 261050233. The next prime is 261050269. The reversal of 261050265 is 562050162.

It is not a de Polignac number, because 261050265 - 2⁵ = 261050233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261050269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 414051 + ... + 414680.

It is an arithmetic number, because the mean of its divisors is an integer number (21547032).

Almost surely, 2^261050265 is an apocalyptic number.

It is an amenable number.

261050265 is a deficient number, since it is larger than the sum of its proper divisors (256078503).

261050265 is a wasteful number, since it uses less digits than its factorization.

261050265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828749 (or 828746 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 261050265 is about 16157.0500092065. The cubic root of 261050265 is about 639.1086754117.

The spelling of 261050265 in words is "two hundred sixty-one million, fifty thousand, two hundred sixty-five".