501506 has 4 divisors (see below), whose sum is σ = 752262. Its totient is φ = 250752.

The previous prime is 501503. The next prime is 501511. The reversal of 501506 is 605105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605105 = 5 ⋅121021.

It can be written as a sum of positive squares in only one way, i.e., 477481 + 24025 = 691^2 + 155^2 .

It is not an unprimeable number, because it can be changed into a prime (501503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125375 + ... + 125378.

2⁵⁰¹⁵⁰⁶ is an apocalyptic number.

501506 is a deficient number, since it is larger than the sum of its proper divisors (250756).

501506 is a wasteful number, since it uses less digits than its factorization.

501506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250755.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 501506 is about 708.1708833325. The cubic root of 501506 is about 79.4496602585.

The spelling of 501506 in words is "five hundred one thousand, five hundred six".