540019 has 4 divisors (see below), whose sum is σ = 543496. Its totient is φ = 536544.

The previous prime is 539993. The next prime is 540041. The reversal of 540019 is 910045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910045 = 5 ⋅182009.

It is a cyclic number.

It is not a de Polignac number, because 540019 - 2⁹ = 539507 is a prime.

It is a super-2 number, since 2×540019² = 583241040722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 539978 and 540005.

It is not an unprimeable number, because it can be changed into a prime (540079) 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, 1494 + ... + 1819.

It is an arithmetic number, because the mean of its divisors is an integer number (135874).

2⁵⁴⁰⁰¹⁹ is an apocalyptic number.

540019 is a deficient number, since it is larger than the sum of its proper divisors (3477).

540019 is a wasteful number, since it uses less digits than its factorization.

540019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3476.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 540019 is about 734.8598505838. The cubic root of 540019 is about 81.4334835595.

The spelling of 540019 in words is "five hundred forty thousand, nineteen".