1223831 has 8 divisors (see below), whose sum is σ = 1405440. Its totient is φ = 1043928.

The previous prime is 1223777. The next prime is 1223857. The reversal of 1223831 is 1383221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1223831 - 2⁶ = 1223767 is a prime.

It is a super-2 number, since 2×1223831² = 2995524633122, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 1223831 parts by 1564 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223231) 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 7 ways as a sum of consecutive naturals, for example, 2270 + ... + 2756.

It is an arithmetic number, because the mean of its divisors is an integer number (175680).

2^1223831 is an apocalyptic number.

1223831 is a deficient number, since it is larger than the sum of its proper divisors (181609).

1223831 is an equidigital number, since it uses as much as digits as its factorization.

1223831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853.

The product of its digits is 288, while the sum is 20.

The square root of 1223831 is about 1106.2689546399. The cubic root of 1223831 is about 106.9647014319.

The spelling of 1223831 in words is "one million, two hundred twenty-three thousand, eight hundred thirty-one".