1266505 has 8 divisors (see below), whose sum is σ = 1569024. Its totient is φ = 980400.

The previous prime is 1266493. The next prime is 1266511. The reversal of 1266505 is 5056621.

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

It is not a de Polignac number, because 1266505 - 2⁹ = 1265993 is a prime.

It is a Duffinian number.

1266505 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1266505.

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, 3931 + ... + 4240.

It is an arithmetic number, because the mean of its divisors is an integer number (196128).

2^1266505 is an apocalyptic number.

It is an amenable number.

1266505 is a deficient number, since it is larger than the sum of its proper divisors (302519).

1266505 is an equidigital number, since it uses as much as digits as its factorization.

1266505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8207.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1266505 is about 1125.3910431490. The cubic root of 1266505 is about 108.1937821795.

It can be divided in two parts, 1266 and 505, that added together give a palindrome (1771).

The spelling of 1266505 in words is "one million, two hundred sixty-six thousand, five hundred five".