1206859 has 4 divisors (see below), whose sum is σ = 1214704. Its totient is φ = 1199016.

The previous prime is 1206841. The next prime is 1206869. The reversal of 1206859 is 9586021.

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 1206859 - 2⁵ = 1206827 is a prime.

It is a super-3 number, since 3×1206859³ = 5273401703577893337, which contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

1206859 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1206859.

It is not an unprimeable number, because it can be changed into a prime (1206809) 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, 3687 + ... + 4000.

It is an arithmetic number, because the mean of its divisors is an integer number (303676).

2^1206859 is an apocalyptic number.

1206859 is a deficient number, since it is larger than the sum of its proper divisors (7845).

1206859 is an equidigital number, since it uses as much as digits as its factorization.

1206859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7844.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1206859 is about 1098.5713449749. The cubic root of 1206859 is about 106.4679383604.

The spelling of 1206859 in words is "one million, two hundred six thousand, eight hundred fifty-nine".