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525980 = 225713172
BaseRepresentation
bin10000000011010011100
3222201111202
42000122130
5113312410
615135032
74320320
oct2003234
9881452
10525980
1132a1a4
12214478
13155540
14d9980
15a5ca5
hex8069c

525980 has 72 divisors (see below), whose sum is σ = 1444128. Its totient is φ = 156672.

The previous prime is 525979. The next prime is 525983. The reversal of 525980 is 89525.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525983) 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 23 ways as a sum of consecutive naturals, for example, 30932 + ... + 30948.

2525980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722064).

525980 is an abundant number, since it is smaller than the sum of its proper divisors (918148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

525980 is a wasteful number, since it uses less digits than its factorization.

525980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 525980 is about 725.2447862619. The cubic root of 525980 is about 80.7215966587.

The spelling of 525980 in words is "five hundred twenty-five thousand, nine hundred eighty".

Divisors: 1 2 4 5 7 10 13 14 17 20 26 28 34 35 52 65 68 70 85 91 119 130 140 170 182 221 238 260 289 340 364 442 455 476 578 595 884 910 1105 1156 1190 1445 1547 1820 2023 2210 2380 2890 3094 3757 4046 4420 5780 6188 7514 7735 8092 10115 15028 15470 18785 20230 26299 30940 37570 40460 52598 75140 105196 131495 262990 525980