261412265 has 16 divisors (see below), whose sum is σ = 321961728. Its totient is φ = 203648256.

The previous prime is 261412259. The next prime is 261412309. The reversal of 261412265 is 562214162.

It is a cyclic number.

It is not a de Polignac number, because 261412265 - 2²⁰ = 260363689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77249 + ... + 80561.

It is an arithmetic number, because the mean of its divisors is an integer number (20122608).

Almost surely, 2^261412265 is an apocalyptic number.

It is an amenable number.

261412265 is a deficient number, since it is larger than the sum of its proper divisors (60549463).

261412265 is a wasteful number, since it uses less digits than its factorization.

261412265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728.

The product of its digits is 5760, while the sum is 29.

The square root of 261412265 is about 16168.2486683005. The cubic root of 261412265 is about 639.4039576009.

The spelling of 261412265 in words is "two hundred sixty-one million, four hundred twelve thousand, two hundred sixty-five".