1366441 has 4 divisors (see below), whose sum is σ = 1371652. Its totient is φ = 1361232.

The previous prime is 1366433. The next prime is 1366459. The reversal of 1366441 is 1446631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1446631 = 23 ⋅62897.

It can be written as a sum of positive squares in 2 ways, for example, as 326041 + 1040400 = 571^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366441 - 2³ = 1366433 is a prime.

It is a super-2 number, since 2×1366441² = 3734322012962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1366471) 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 3 ways as a sum of consecutive naturals, for example, 2190 + ... + 2743.

It is an arithmetic number, because the mean of its divisors is an integer number (342913).

2^1366441 is an apocalyptic number.

It is an amenable number.

1366441 is a deficient number, since it is larger than the sum of its proper divisors (5211).

1366441 is an equidigital number, since it uses as much as digits as its factorization.

1366441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5210.

The product of its digits is 1728, while the sum is 25.

The square root of 1366441 is about 1168.9486729536. The cubic root of 1366441 is about 110.9677963013.

The spelling of 1366441 in words is "one million, three hundred sixty-six thousand, four hundred forty-one".