1366423 has 4 divisors (see below), whose sum is σ = 1438360. Its totient is φ = 1294488.

The previous prime is 1366397. The next prime is 1366427. The reversal of 1366423 is 3246631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3246631 = 89 ⋅36479.

It is a cyclic number.

It is not a de Polignac number, because 1366423 - 2⁹ = 1365911 is a prime.

It is a super-2 number, since 2×1366423² = 3734223629858, which contains 22 as substring.

It is a Duffinian number.

1366423 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366427) 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, 35940 + ... + 35977.

It is an arithmetic number, because the mean of its divisors is an integer number (359590).

2^1366423 is an apocalyptic number.

1366423 is a deficient number, since it is larger than the sum of its proper divisors (71937).

1366423 is an equidigital number, since it uses as much as digits as its factorization.

1366423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71936.

The product of its digits is 2592, while the sum is 25.

The square root of 1366423 is about 1168.9409737023. The cubic root of 1366423 is about 110.9673090431.

The spelling of 1366423 in words is "one million, three hundred sixty-six thousand, four hundred twenty-three".