1280266 has 16 divisors (see below), whose sum is σ = 2120328. Its totient is φ = 576000.

The previous prime is 1280231. The next prime is 1280267. The reversal of 1280266 is 6620821.

It can be written as a sum of positive squares in 4 ways, for example, as 133225 + 1147041 = 365^2 + 1071^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1280266.

It is not an unprimeable number, because it can be changed into a prime (1280267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466 + ... + 1666.

2^1280266 is an apocalyptic number.

1280266 is a deficient number, since it is larger than the sum of its proper divisors (840062).

1280266 is a wasteful number, since it uses less digits than its factorization.

1280266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1280266 is about 1131.4884002941. The cubic root of 1280266 is about 108.5842253417.

The spelling of 1280266 in words is "one million, two hundred eighty thousand, two hundred sixty-six".