1366905 has 8 divisors (see below), whose sum is σ = 2187072. Its totient is φ = 729008.

The previous prime is 1366903. The next prime is 1366907. The reversal of 1366905 is 5096631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1366903) and next prime (1366907).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1366905 - 2¹ = 1366903 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1366903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45549 + ... + 45578.

It is an arithmetic number, because the mean of its divisors is an integer number (273384).

2^1366905 is an apocalyptic number.

1366905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1366905 is a deficient number, since it is larger than the sum of its proper divisors (820167).

1366905 is an equidigital number, since it uses as much as digits as its factorization.

1366905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91135.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 1366905 is about 1169.1471250446. The cubic root of 1366905 is about 110.9803552606.

The spelling of 1366905 in words is "one million, three hundred sixty-six thousand, nine hundred five".