1266481 has 4 divisors (see below), whose sum is σ = 1269364. Its totient is φ = 1263600.

The previous prime is 1266469. The next prime is 1266487. The reversal of 1266481 is 1846621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1846621 = 7 ⋅263803.

It can be written as a sum of positive squares in 2 ways, for example, as 665856 + 600625 = 816^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266481 - 2⁹ = 1265969 is a prime.

It is a super-2 number, since 2×1266481² = 3207948246722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630 + ... + 1711.

It is an arithmetic number, because the mean of its divisors is an integer number (317341).

2^1266481 is an apocalyptic number.

It is an amenable number.

1266481 is a deficient number, since it is larger than the sum of its proper divisors (2883).

1266481 is an equidigital number, since it uses as much as digits as its factorization.

1266481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882.

The product of its digits is 2304, while the sum is 28.

The square root of 1266481 is about 1125.3803801382. The cubic root of 1266481 is about 108.1930987588.

The spelling of 1266481 in words is "one million, two hundred sixty-six thousand, four hundred eighty-one".