1266506 has 4 divisors (see below), whose sum is σ = 1899762. Its totient is φ = 633252.

The previous prime is 1266493. The next prime is 1266511. The reversal of 1266506 is 6056621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 410881 = 925^2 + 641^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316625 + ... + 316628.

2^1266506 is an apocalyptic number.

1266506 is a deficient number, since it is larger than the sum of its proper divisors (633256).

1266506 is an equidigital number, since it uses as much as digits as its factorization.

1266506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633255.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1266506 is about 1125.3914874389. The cubic root of 1266506 is about 108.1938106552.

The spelling of 1266506 in words is "one million, two hundred sixty-six thousand, five hundred six".