1209841 has 2 divisors, whose sum is σ = 1209842. Its totient is φ = 1209840.

The previous prime is 1209821. The next prime is 1209853. The reversal of 1209841 is 1489021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1199025 + 10816 = 1095^2 + 104^2 .

It is an emirp because it is prime and its reverse (1489021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1209841 - 2⁵ = 1209809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1209811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604920 + 604921.

It is an arithmetic number, because the mean of its divisors is an integer number (604921).

2^1209841 is an apocalyptic number.

It is an amenable number.

1209841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209841 is an equidigital number, since it uses as much as digits as its factorization.

1209841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1209841 is about 1099.9277248983. The cubic root of 1209841 is about 106.5555559583. Note that the first 6 decimals are identical.

The spelling of 1209841 in words is "one million, two hundred nine thousand, eight hundred forty-one".