1005023 has 4 divisors (see below), whose sum is σ = 1064160. Its totient is φ = 945888.

The previous prime is 1005019. The next prime is 1005029. The reversal of 1005023 is 3205001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3205001 = 61 ⋅52541.

It is a cyclic number.

It is not a de Polignac number, because 1005023 - 2² = 1005019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1004995 and 1005013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005029) 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, 29543 + ... + 29576.

It is an arithmetic number, because the mean of its divisors is an integer number (266040).

2^1005023 is an apocalyptic number.

1005023 is a deficient number, since it is larger than the sum of its proper divisors (59137).

1005023 is an equidigital number, since it uses as much as digits as its factorization.

1005023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59136.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 1005023 is about 1002.5083540799. The cubic root of 1005023 is about 100.1671537738.

The spelling of 1005023 in words is "one million, five thousand, twenty-three".