542505 has 16 divisors (see below), whose sum is σ = 884160. Its totient is φ = 283968.

The previous prime is 542497. The next prime is 542519. The reversal of 542505 is 505245.

It is not a de Polignac number, because 542505 - 2³ = 542497 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 542505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (55260).

2⁵⁴²⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

542505 is a deficient number, since it is larger than the sum of its proper divisors (341655).

542505 is a wasteful number, since it uses less digits than its factorization.

542505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 542505 is about 736.5493873462. The cubic root of 542505 is about 81.5582531075.

The spelling of 542505 in words is "five hundred forty-two thousand, five hundred five".