1366859 has 4 divisors (see below), whose sum is σ = 1472016. Its totient is φ = 1261704.

The previous prime is 1366843. The next prime is 1366861. The reversal of 1366859 is 9586631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1366859 - 2⁴ = 1366843 is a prime.

It is a super-3 number, since 3×1366859³ = 7661122467246533337, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1366829) 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, 52559 + ... + 52584.

It is an arithmetic number, because the mean of its divisors is an integer number (368004).

2^1366859 is an apocalyptic number.

1366859 is a deficient number, since it is larger than the sum of its proper divisors (105157).

1366859 is a wasteful number, since it uses less digits than its factorization.

1366859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105156.

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

The square root of 1366859 is about 1169.1274524191. The cubic root of 1366859 is about 110.9791103183.

The spelling of 1366859 in words is "one million, three hundred sixty-six thousand, eight hundred fifty-nine".