501541 has 4 divisors (see below), whose sum is σ = 503712. Its totient is φ = 499372.

The previous prime is 501511. The next prime is 501563. The reversal of 501541 is 145105.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145105 = 5 ⋅29021.

It is a cyclic number.

It is not a de Polignac number, because 501541 - 2⁹ = 501029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501511) 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 3 ways as a sum of consecutive naturals, for example, 691 + ... + 1216.

It is an arithmetic number, because the mean of its divisors is an integer number (125928).

2⁵⁰¹⁵⁴¹ is an apocalyptic number.

It is an amenable number.

501541 is a deficient number, since it is larger than the sum of its proper divisors (2171).

501541 is a wasteful number, since it uses less digits than its factorization.

501541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 501541 is about 708.1955944511. The cubic root of 501541 is about 79.4515084740.

Adding to 501541 its reverse (145105), we get a palindrome (646646).

The spelling of 501541 in words is "five hundred one thousand, five hundred forty-one".