501081 has 16 divisors (see below), whose sum is σ = 774144. Its totient is φ = 282384.

The previous prime is 501077. The next prime is 501089. The reversal of 501081 is 180105.

It is a happy number.

It is not a de Polignac number, because 501081 - 2² = 501077 is a prime.

It is a super-2 number, since 2×501081² = 502164337122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 501081.

It is not an unprimeable number, because it can be changed into a prime (501089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2136 + ... + 2358.

It is an arithmetic number, because the mean of its divisors is an integer number (48384).

2⁵⁰¹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

501081 is a deficient number, since it is larger than the sum of its proper divisors (273063).

501081 is a wasteful number, since it uses less digits than its factorization.

501081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 501081 is about 707.8707509143. The cubic root of 501081 is about 79.4272107774.

Adding to 501081 its reverse (180105), we get a palindrome (681186).

The spelling of 501081 in words is "five hundred one thousand, eighty-one".