1209846 has 32 divisors (see below), whose sum is σ = 2757888. Its totient is φ = 350240.

The previous prime is 1209841. The next prime is 1209853. The reversal of 1209846 is 6489021.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1120 + ... + 1916.

It is an arithmetic number, because the mean of its divisors is an integer number (86184).

2^1209846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1378944).

1209846 is an abundant number, since it is smaller than the sum of its proper divisors (1548042).

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

1209846 is a wasteful number, since it uses less digits than its factorization.

1209846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1209846 is about 1099.9299977726. The cubic root of 1209846 is about 106.5557027481. Note that the first 3 decimals are identical.

It can be divided in two parts, 120984 and 6, that multiplied together give a square (725904 = 852²).

The spelling of 1209846 in words is "one million, two hundred nine thousand, eight hundred forty-six".