1366447 has 4 divisors (see below), whose sum is σ = 1403416. Its totient is φ = 1329480.

The previous prime is 1366433. The next prime is 1366459. The reversal of 1366447 is 7446631.

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

It is a cyclic number.

It is not a de Polignac number, because 1366447 - 2¹¹ = 1364399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18429 + ... + 18502.

It is an arithmetic number, because the mean of its divisors is an integer number (350854).

2^1366447 is an apocalyptic number.

1366447 is a deficient number, since it is larger than the sum of its proper divisors (36969).

1366447 is an equidigital number, since it uses as much as digits as its factorization.

1366447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36968.

The product of its digits is 12096, while the sum is 31.

The square root of 1366447 is about 1168.9512393595. The cubic root of 1366447 is about 110.9679587198.

The spelling of 1366447 in words is "one million, three hundred sixty-six thousand, four hundred forty-seven".