1266755 has 16 divisors (see below), whose sum is σ = 1840320. Its totient is φ = 817152.

The previous prime is 1266751. The next prime is 1266757. The reversal of 1266755 is 5576621.

It is a happy number.

It is not a de Polignac number, because 1266755 - 2² = 1266751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1266751) 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, 470 + ... + 1659.

It is an arithmetic number, because the mean of its divisors is an integer number (115020).

2^1266755 is an apocalyptic number.

1266755 is a deficient number, since it is larger than the sum of its proper divisors (573565).

1266755 is a wasteful number, since it uses less digits than its factorization.

1266755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158.

The product of its digits is 12600, while the sum is 32.

The square root of 1266755 is about 1125.5021101713. The cubic root of 1266755 is about 108.2009006318.

It can be divided in two parts, 126675 and 5, that multiplied together give a triangular number (633375 = T₁₁₂₅).

The spelling of 1266755 in words is "one million, two hundred sixty-six thousand, seven hundred fifty-five".