1366589 has 8 divisors (see below), whose sum is σ = 1571328. Its totient is φ = 1164240.

The previous prime is 1366577. The next prime is 1366597. The reversal of 1366589 is 9856631.

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

It is not a de Polignac number, because 1366589 - 2⁸ = 1366333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884 + ... + 1874.

It is an arithmetic number, because the mean of its divisors is an integer number (196416).

2^1366589 is an apocalyptic number.

It is an amenable number.

1366589 is a deficient number, since it is larger than the sum of its proper divisors (204739).

1366589 is an equidigital number, since it uses as much as digits as its factorization.

1366589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195.

The product of its digits is 38880, while the sum is 38.

The square root of 1366589 is about 1169.0119759866. The cubic root of 1366589 is about 110.9718024850.

The spelling of 1366589 in words is "one million, three hundred sixty-six thousand, five hundred eighty-nine".