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428525 = 5261281
BaseRepresentation
bin1101000100111101101
3210202211022
41220213231
5102203100
613103525
73433226
oct1504755
9722738
10428525
11272a59
12187ba5
13120086
14b224d
1586e85
hex689ed

428525 has 12 divisors (see below), whose sum is σ = 542004. Its totient is φ = 336000.

The previous prime is 428509. The next prime is 428531. The reversal of 428525 is 525824.

It can be written as a sum of positive squares in 6 ways, for example, as 51529 + 376996 = 227^2 + 614^2 .

It is not a de Polignac number, because 428525 - 24 = 428509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428494 and 428503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1385 + ... + 1665.

It is an arithmetic number, because the mean of its divisors is an integer number (45167).

2428525 is an apocalyptic number.

It is an amenable number.

428525 is a deficient number, since it is larger than the sum of its proper divisors (113479).

428525 is a wasteful number, since it uses less digits than its factorization.

428525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 347 counting only the distinct ones).

The product of its digits is 3200, while the sum is 26.

The square root of 428525 is about 654.6182093404. The cubic root of 428525 is about 75.3920214266.

The spelling of 428525 in words is "four hundred twenty-eight thousand, five hundred twenty-five".

Divisors: 1 5 25 61 281 305 1405 1525 7025 17141 85705 428525