542605 has 16 divisors (see below), whose sum is σ = 766080. Its totient is φ = 361152.

The previous prime is 542603. The next prime is 542683. The reversal of 542605 is 506245.

It is a cyclic number.

It is not a de Polignac number, because 542605 - 2¹ = 542603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1086 + ... + 1504.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2⁵⁴²⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

542605 is a deficient number, since it is larger than the sum of its proper divisors (223475).

542605 is a wasteful number, since it uses less digits than its factorization.

542605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 542605 is about 736.6172683287. The cubic root of 542605 is about 81.5632640132.

The spelling of 542605 in words is "five hundred forty-two thousand, six hundred five".