1366443 has 32 divisors (see below), whose sum is σ = 2318400. Its totient is φ = 787968.

The previous prime is 1366433. The next prime is 1366459. The reversal of 1366443 is 3446631.

1366443 is a `hidden beast` number, since 13 + 6 + 644 + 3 = 666.

It is not a de Polignac number, because 1366443 - 2⁴ = 1366427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1366433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5853 + ... + 6081.

It is an arithmetic number, because the mean of its divisors is an integer number (72450).

2^1366443 is an apocalyptic number.

1366443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1366443 is a deficient number, since it is larger than the sum of its proper divisors (951957).

1366443 is a wasteful number, since it uses less digits than its factorization.

1366443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 262 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 1366443 is about 1168.9495284228. The cubic root of 1366443 is about 110.9678504409.

The spelling of 1366443 in words is "one million, three hundred sixty-six thousand, four hundred forty-three".