261246265 has 8 divisors (see below), whose sum is σ = 358280640. Its totient is φ = 179140272.

The previous prime is 261246263. The next prime is 261246281. The reversal of 261246265 is 562642162.

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 261246265 - 2¹ = 261246263 is a prime.

It is a super-2 number, since 2×261246265² = 136499221952900450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261246265.

It is not an unprimeable number, because it can be changed into a prime (261246263) 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, 3732055 + ... + 3732124.

It is an arithmetic number, because the mean of its divisors is an integer number (44785080).

Almost surely, 2^261246265 is an apocalyptic number.

It is an amenable number.

261246265 is a deficient number, since it is larger than the sum of its proper divisors (97034375).

261246265 is an equidigital number, since it uses as much as digits as its factorization.

261246265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7464191.

The product of its digits is 34560, while the sum is 34.

The square root of 261246265 is about 16163.1143348057. The cubic root of 261246265 is about 639.2685858197.

The spelling of 261246265 in words is "two hundred sixty-one million, two hundred forty-six thousand, two hundred sixty-five".