1023005 has 4 divisors (see below), whose sum is σ = 1227612. Its totient is φ = 818400.

The previous prime is 1022981. The next prime is 1023019. The reversal of 1023005 is 5003201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 556516 + 466489 = 746^2 + 683^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1023005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102296 + ... + 102305.

It is an arithmetic number, because the mean of its divisors is an integer number (306903).

2^1023005 is an apocalyptic number.

It is an amenable number.

1023005 is a deficient number, since it is larger than the sum of its proper divisors (204607).

1023005 is an equidigital number, since it uses as much as digits as its factorization.

1023005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204606.

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

The square root of 1023005 is about 1011.4370964128. The cubic root of 1023005 is about 100.7610270201.

Adding to 1023005 its reverse (5003201), we get a palindrome (6026206).

The spelling of 1023005 in words is "one million, twenty-three thousand, five".