1366273 has 4 divisors (see below), whose sum is σ = 1446660. Its totient is φ = 1285888.

The previous prime is 1366241. The next prime is 1366279. The reversal of 1366273 is 3726631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 859329 + 506944 = 927^2 + 712^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366273 - 2⁵ = 1366241 is a prime.

It is a Duffinian number.

1366273 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1366279) 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, 40168 + ... + 40201.

It is an arithmetic number, because the mean of its divisors is an integer number (361665).

2^1366273 is an apocalyptic number.

It is an amenable number.

1366273 is a deficient number, since it is larger than the sum of its proper divisors (80387).

1366273 is an equidigital number, since it uses as much as digits as its factorization.

1366273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80386.

The product of its digits is 4536, while the sum is 28.

The square root of 1366273 is about 1168.8768113022. The cubic root of 1366273 is about 110.9632483909.

The spelling of 1366273 in words is "one million, three hundred sixty-six thousand, two hundred seventy-three".