540421 has 12 divisors (see below), whose sum is σ = 646380. Its totient is φ = 450240.

The previous prime is 540391. The next prime is 540433. The reversal of 540421 is 124045.

It can be written as a sum of positive squares in 2 ways, for example, as 30625 + 509796 = 175^2 + 714^2 .

It is not a de Polignac number, because 540421 - 2⁵ = 540389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 540395 and 540404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1875 + ... + 2143.

It is an arithmetic number, because the mean of its divisors is an integer number (53865).

2⁵⁴⁰⁴²¹ is an apocalyptic number.

It is an amenable number.

540421 is a deficient number, since it is larger than the sum of its proper divisors (105959).

540421 is a wasteful number, since it uses less digits than its factorization.

540421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 540421 is about 735.1333212418. The cubic root of 540421 is about 81.4536854046.

Adding to 540421 its reverse (124045), we get a palindrome (664466).

It can be divided in two parts, 540 and 421, that added together give a square (961 = 31²).

The spelling of 540421 in words is "five hundred forty thousand, four hundred twenty-one".