1339806 has 32 divisors (see below), whose sum is σ = 2933280. Its totient is φ = 405504.

The previous prime is 1339781. The next prime is 1339813. The reversal of 1339806 is 6089331.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6846 + ... + 7038.

It is an arithmetic number, because the mean of its divisors is an integer number (91665).

2^1339806 is an apocalyptic number.

It is a pronic number, being equal to 1157×1158.

It is a practical number, because each smaller number is the sum of distinct divisors of 1339806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1466640).

1339806 is an abundant number, since it is smaller than the sum of its proper divisors (1593474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1339806 is a wasteful number, since it uses less digits than its factorization.

1339806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1339806 is about 1157.4998920086. The cubic root of 1339806 is about 110.2420564924.

It can be divided in two parts, 1339 and 806, that added together give a triangular number (2145 = T₆₅).

The spelling of 1339806 in words is "one million, three hundred thirty-nine thousand, eight hundred six".