1366287 has 16 divisors (see below), whose sum is σ = 2001888. Its totient is φ = 823680.

The previous prime is 1366279. The next prime is 1366289. The reversal of 1366287 is 7826631.

It is not a de Polignac number, because 1366287 - 2³ = 1366279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366289) 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 15 ways as a sum of consecutive naturals, for example, 1737 + ... + 2397.

It is an arithmetic number, because the mean of its divisors is an integer number (125118).

2^1366287 is an apocalyptic number.

1366287 is a deficient number, since it is larger than the sum of its proper divisors (635601).

1366287 is a wasteful number, since it uses less digits than its factorization.

1366287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730.

The product of its digits is 12096, while the sum is 33.

The square root of 1366287 is about 1168.8827999419. The cubic root of 1366287 is about 110.9636273977.

It can be divided in two parts, 1366 and 287, that added together give a triangular number (1653 = T₅₇).

The spelling of 1366287 in words is "one million, three hundred sixty-six thousand, two hundred eighty-seven".