1366023 has 4 divisors (see below), whose sum is σ = 1821368. Its totient is φ = 910680.

The previous prime is 1366021. The next prime is 1366031. The reversal of 1366023 is 3206631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3206631 = 3 ⋅1068877.

It is not a de Polignac number, because 1366023 - 2¹ = 1366021 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366021) 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, 227668 + ... + 227673.

It is an arithmetic number, because the mean of its divisors is an integer number (455342).

2^1366023 is an apocalyptic number.

1366023 is a deficient number, since it is larger than the sum of its proper divisors (455345).

1366023 is an equidigital number, since it uses as much as digits as its factorization.

1366023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455344.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1366023 is about 1168.7698661413. The cubic root of 1366023 is about 110.9564799768.

The spelling of 1366023 in words is "one million, three hundred sixty-six thousand, twenty-three".