1231841 has 12 divisors (see below), whose sum is σ = 1376892. Its totient is φ = 1100736.

The previous prime is 1231831. The next prime is 1231843. The reversal of 1231841 is 1481321.

It can be written as a sum of positive squares in 6 ways, for example, as 30625 + 1201216 = 175^2 + 1096^2 .

It is not a de Polignac number, because 1231841 - 2¹⁴ = 1215457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231843) 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, 6155 + ... + 6351.

It is an arithmetic number, because the mean of its divisors is an integer number (114741).

2^1231841 is an apocalyptic number.

It is an amenable number.

1231841 is a deficient number, since it is larger than the sum of its proper divisors (145051).

1231841 is a wasteful number, since it uses less digits than its factorization.

1231841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 247 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 1231841 is about 1109.8833272016. The cubic root of 1231841 is about 107.1975562393.

The spelling of 1231841 in words is "one million, two hundred thirty-one thousand, eight hundred forty-one".