1040023 has 4 divisors (see below), whose sum is σ = 1043280. Its totient is φ = 1036768.

The previous prime is 1040021. The next prime is 1040029. The reversal of 1040023 is 3200401.

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

It is a cyclic number.

It is not a de Polignac number, because 1040023 - 2¹ = 1040021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1039991 and 1040009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040021) 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, 1090 + ... + 1807.

It is an arithmetic number, because the mean of its divisors is an integer number (260820).

2^1040023 is an apocalyptic number.

1040023 is a deficient number, since it is larger than the sum of its proper divisors (3257).

1040023 is an equidigital number, since it uses as much as digits as its factorization.

1040023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 1040023 is about 1019.8151793340. The cubic root of 1040023 is about 101.3166872568.

Adding to 1040023 its reverse (3200401), we get a palindrome (4240424).

The spelling of 1040023 in words is "one million, forty thousand, twenty-three".