265125261 has 8 divisors (see below), whose sum is σ = 361021824. Its totient is φ = 172989440.

The previous prime is 265125257. The next prime is 265125271. The reversal of 265125261 is 162521562.

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 265125261 - 2² = 265125257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265125241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 940020 + ... + 940301.

It is an arithmetic number, because the mean of its divisors is an integer number (45127728).

Almost surely, 2^265125261 is an apocalyptic number.

It is an amenable number.

265125261 is a deficient number, since it is larger than the sum of its proper divisors (95896563).

265125261 is a wasteful number, since it uses less digits than its factorization.

265125261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880371.

The product of its digits is 7200, while the sum is 30.

The square root of 265125261 is about 16282.6675025931. The cubic root of 265125261 is about 642.4170168430.

The spelling of 265125261 in words is "two hundred sixty-five million, one hundred twenty-five thousand, two hundred sixty-one".