541021 has 4 divisors (see below), whose sum is σ = 582652. Its totient is φ = 499392.

The previous prime is 541007. The next prime is 541027. The reversal of 541021 is 120145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120145 = 5 ⋅24029.

It can be written as a sum of positive squares in 2 ways, for example, as 372100 + 168921 = 610^2 + 411^2 .

It is a cyclic number.

It is not a de Polignac number, because 541021 - 2⁵ = 540989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 41617 = 541021 / (5 + 4 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 540992 and 541010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541027) 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, 20796 + ... + 20821.

It is an arithmetic number, because the mean of its divisors is an integer number (145663).

2⁵⁴¹⁰²¹ is an apocalyptic number.

It is an amenable number.

541021 is a deficient number, since it is larger than the sum of its proper divisors (41631).

541021 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 14 representation: 541021 = (101245)₁₄.

541021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41630.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 541021 is about 735.5412972770. The cubic root of 541021 is about 81.4838187856.

Adding to 541021 its reverse (120145), we get a palindrome (661166).

The spelling of 541021 in words is "five hundred forty-one thousand, twenty-one".