1366567 has 4 divisors (see below), whose sum is σ = 1413720. Its totient is φ = 1319416.

The previous prime is 1366549. The next prime is 1366577. The reversal of 1366567 is 7656631.

It is a happy number.

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 1366567 - 2¹⁵ = 1333799 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 (1366507) 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, 23533 + ... + 23590.

It is an arithmetic number, because the mean of its divisors is an integer number (353430).

2^1366567 is an apocalyptic number.

1366567 is a deficient number, since it is larger than the sum of its proper divisors (47153).

1366567 is an equidigital number, since it uses as much as digits as its factorization.

1366567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47152.

The product of its digits is 22680, while the sum is 34.

The square root of 1366567 is about 1169.0025662932. The cubic root of 1366567 is about 110.9712069895.

Subtracting 1366567 from its reverse (7656631), we obtain a square (6290064 = 2508²).

The spelling of 1366567 in words is "one million, three hundred sixty-six thousand, five hundred sixty-seven".