501023 has 4 divisors (see below), whose sum is σ = 503088. Its totient is φ = 498960.

The previous prime is 501019. The next prime is 501029. The reversal of 501023 is 320105.

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 501023 - 2² = 501019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 500995 and 501013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501029) 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, 611 + ... + 1172.

It is an arithmetic number, because the mean of its divisors is an integer number (125772).

2⁵⁰¹⁰²³ is an apocalyptic number.

501023 is a deficient number, since it is larger than the sum of its proper divisors (2065).

501023 is a wasteful number, since it uses less digits than its factorization.

501023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064.

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

The square root of 501023 is about 707.8297817979. The cubic root of 501023 is about 79.4241460993.

Adding to 501023 its reverse (320105), we get a palindrome (821128).

It can be divided in two parts, 50102 and 3, that added together give a palindrome (50105).

The spelling of 501023 in words is "five hundred one thousand, twenty-three".