1209853 has 2 divisors, whose sum is σ = 1209854. Its totient is φ = 1209852.

The previous prime is 1209841. The next prime is 1209877. The reversal of 1209853 is 3589021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 636804 + 573049 = 798^2 + 757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1209853 - 2⁵ = 1209821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1209883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604926 + 604927.

It is an arithmetic number, because the mean of its divisors is an integer number (604927).

2^1209853 is an apocalyptic number.

It is an amenable number.

1209853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209853 is an equidigital number, since it uses as much as digits as its factorization.

1209853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1209853 is about 1099.9331797887. The cubic root of 1209853 is about 106.5559082532. Note that the first 3 decimals are identical.

The spelling of 1209853 in words is "one million, two hundred nine thousand, eight hundred fifty-three".