1223841 has 4 divisors (see below), whose sum is σ = 1631792. Its totient is φ = 815892.

The previous prime is 1223777. The next prime is 1223857. The reversal of 1223841 is 1483221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1483221 = 3 ⋅494407.

It is not a de Polignac number, because 1223841 - 2⁶ = 1223777 is a prime.

It is a D-number.

It is a Duffinian number.

1223841 is a lucky number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1223941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203971 + ... + 203976.

It is an arithmetic number, because the mean of its divisors is an integer number (407948).

2^1223841 is an apocalyptic number.

It is an amenable number.

1223841 is a deficient number, since it is larger than the sum of its proper divisors (407951).

1223841 is an equidigital number, since it uses as much as digits as its factorization.

1223841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407950.

The product of its digits is 384, while the sum is 21.

The square root of 1223841 is about 1106.2734743272. The cubic root of 1223841 is about 106.9649927695.

The spelling of 1223841 in words is "one million, two hundred twenty-three thousand, eight hundred forty-one".