1211841 has 12 divisors (see below), whose sum is σ = 1815632. Its totient is φ = 807732.

The previous prime is 1211827. The next prime is 1211843. The reversal of 1211841 is 1481121.

It is not a de Polignac number, because 1211841 - 2¹⁰ = 1210817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211843) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2251 + ... + 2736.

2^1211841 is an apocalyptic number.

It is an amenable number.

1211841 is a deficient number, since it is larger than the sum of its proper divisors (603791).

1211841 is an frugal number, since it uses more digits than its factorization.

1211841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002 (or 4990 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The square root of 1211841 is about 1100.8365001216. The cubic root of 1211841 is about 106.6142396442.

Adding to 1211841 its reverse (1481121), we get a palindrome (2692962).

The spelling of 1211841 in words is "one million, two hundred eleven thousand, eight hundred forty-one".