1266588265 has 8 divisors (see below), whose sum is σ = 1585988928. Its totient is φ = 969215280.

The previous prime is 1266588229. The next prime is 1266588283. The reversal of 1266588265 is 5628856621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1266588265 - 2⁹ = 1266587753 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, 5506791 + ... + 5507020.

It is an arithmetic number, because the mean of its divisors is an integer number (198248616).

Almost surely, 2^1266588265 is an apocalyptic number.

It is an amenable number.

1266588265 is a deficient number, since it is larger than the sum of its proper divisors (319400663).

1266588265 is a wasteful number, since it uses less digits than its factorization.

1266588265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11013839.

The product of its digits is 1382400, while the sum is 49.

The square root of 1266588265 is about 35589.1593747310. The cubic root of 1266588265 is about 1081.9615315527.

The spelling of 1266588265 in words is "one billion, two hundred sixty-six million, five hundred eighty-eight thousand, two hundred sixty-five".