1366039 has 4 divisors (see below), whose sum is σ = 1425456. Its totient is φ = 1306624.

The previous prime is 1366031. The next prime is 1366087. The reversal of 1366039 is 9306631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9306631 = 41 ⋅226991.

It is a cyclic number.

It is not a de Polignac number, because 1366039 - 2³ = 1366031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1365998 and 1366016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366031) 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, 29674 + ... + 29719.

It is an arithmetic number, because the mean of its divisors is an integer number (356364).

2^1366039 is an apocalyptic number.

1366039 is a deficient number, since it is larger than the sum of its proper divisors (59417).

1366039 is an equidigital number, since it uses as much as digits as its factorization.

1366039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59416.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 1366039 is about 1168.7767109247. The cubic root of 1366039 is about 110.9569131800.

The spelling of 1366039 in words is "one million, three hundred sixty-six thousand, thirty-nine".