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204542 = 2137867
BaseRepresentation
bin110001111011111110
3101101120122
4301323332
523021132
64214542
71511222
oct617376
9341518
10204542
1112a748
129a452
1372140
1454782
1540912
hex31efe

204542 has 8 divisors (see below), whose sum is σ = 330456. Its totient is φ = 94392.

The previous prime is 204521. The next prime is 204557. The reversal of 204542 is 245402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 204542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3908 + ... + 3959.

It is an arithmetic number, because the mean of its divisors is an integer number (41307).

2204542 is an apocalyptic number.

204542 is a deficient number, since it is larger than the sum of its proper divisors (125914).

204542 is a wasteful number, since it uses less digits than its factorization.

204542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7882.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 204542 is about 452.2631977068. The cubic root of 204542 is about 58.9197414904.

Adding to 204542 its reverse (245402), we get a palindrome (449944).

The spelling of 204542 in words is "two hundred four thousand, five hundred forty-two".

Divisors: 1 2 13 26 7867 15734 102271 204542