1266559 has 16 divisors (see below), whose sum is σ = 1555200. Its totient is φ = 1007424.

The previous prime is 1266557. The next prime is 1266563. The reversal of 1266559 is 9556621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1266559 - 2¹ = 1266557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11784 + ... + 11890.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

2^1266559 is an apocalyptic number.

1266559 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1266559 is a deficient number, since it is larger than the sum of its proper divisors (288641).

1266559 is a wasteful number, since it uses less digits than its factorization.

1266559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222.

The product of its digits is 16200, while the sum is 34.

The square root of 1266559 is about 1125.4150345539. The cubic root of 1266559 is about 108.1953198445.

The spelling of 1266559 in words is "one million, two hundred sixty-six thousand, five hundred fifty-nine".