1366305 has 16 divisors (see below), whose sum is σ = 2215680. Its totient is φ = 718848.

The previous prime is 1366303. The next prime is 1366327. The reversal of 1366305 is 5036631.

It is not a de Polignac number, because 1366305 - 2¹ = 1366303 is a prime.

1366305 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1366303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609 + ... + 1761.

It is an arithmetic number, because the mean of its divisors is an integer number (138480).

2^1366305 is an apocalyptic number.

1366305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1366305 is a deficient number, since it is larger than the sum of its proper divisors (849375).

1366305 is a wasteful number, since it uses less digits than its factorization.

1366305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 1366305 is about 1168.8904995764. The cubic root of 1366305 is about 110.9641146883.

It can be divided in two parts, 136 and 6305, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 1366305 in words is "one million, three hundred sixty-six thousand, three hundred five".