1231023 has 4 divisors (see below), whose sum is σ = 1641368. Its totient is φ = 820680.

The previous prime is 1231003. The next prime is 1231039. The reversal of 1231023 is 3201321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1231023 - 2¹⁰ = 1229999 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231003) 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 3 ways as a sum of consecutive naturals, for example, 205168 + ... + 205173.

It is an arithmetic number, because the mean of its divisors is an integer number (410342).

2^1231023 is an apocalyptic number.

1231023 is a deficient number, since it is larger than the sum of its proper divisors (410345).

1231023 is an equidigital number, since it uses as much as digits as its factorization.

1231023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410344.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1231023 is about 1109.5147588022. The cubic root of 1231023 is about 107.1738229226.

Adding to 1231023 its reverse (3201321), we get a palindrome (4432344).

The spelling of 1231023 in words is "one million, two hundred thirty-one thousand, twenty-three".