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528981 = 3176327
BaseRepresentation
bin10000001001001010101
3222212121220
42001021111
5113411411
615200553
74332135
oct2011125
9885556
10528981
11331482
12216159
13156a0b
14daac5
15a6b06
hex81255

528981 has 4 divisors (see below), whose sum is σ = 705312. Its totient is φ = 352652.

The previous prime is 528973. The next prime is 528991. The reversal of 528981 is 189825.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 528981 - 23 = 528973 is a prime.

It is a super-2 number, since 2×5289812 = 559641796722, which contains 22 as substring.

It is a D-number.

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 528981.

It is not an unprimeable number, because it can be changed into a prime (528911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88161 + ... + 88166.

It is an arithmetic number, because the mean of its divisors is an integer number (176328).

2528981 is an apocalyptic number.

It is an amenable number.

528981 is a deficient number, since it is larger than the sum of its proper divisors (176331).

528981 is a wasteful number, since it uses less digits than its factorization.

528981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176330.

The product of its digits is 5760, while the sum is 33.

The square root of 528981 is about 727.3108001398. The cubic root of 528981 is about 80.8748257121.

The spelling of 528981 in words is "five hundred twenty-eight thousand, nine hundred eighty-one".

Divisors: 1 3 176327 528981