1366825 has 6 divisors (see below), whose sum is σ = 1694894. Its totient is φ = 1093440.

The previous prime is 1366801. The next prime is 1366829. The reversal of 1366825 is 5286631.

It can be written as a sum of positive squares in 3 ways, for example, as 2601 + 1364224 = 51^2 + 1168^2 .

It is not a de Polignac number, because 1366825 - 2⁵ = 1366793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1366829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27312 + ... + 27361.

2^1366825 is an apocalyptic number.

It is an amenable number.

1366825 is a deficient number, since it is larger than the sum of its proper divisors (328069).

1366825 is an equidigital number, since it uses as much as digits as its factorization.

1366825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54683 (or 54678 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 1366825 is about 1169.1129115701. The cubic root of 1366825 is about 110.9781901256.

The spelling of 1366825 in words is "one million, three hundred sixty-six thousand, eight hundred twenty-five".