Search a number
-
+
7018525 = 52535297
BaseRepresentation
bin11010110001100000011101
3111012120121101
4122301200131
53244043100
6410233101
7113441113
oct32614035
914176541
107018525
113a64138
122425791
1315b9797
14d09ab3
1593986a
hex6b181d

7018525 has 12 divisors (see below), whose sum is σ = 8868852. Its totient is φ = 5507840.

The previous prime is 7018513. The next prime is 7018541. The reversal of 7018525 is 5258107.

It can be written as a sum of positive squares in 6 ways, for example, as 143641 + 6874884 = 379^2 + 2622^2 .

It is not a de Polignac number, because 7018525 - 217 = 6887453 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7018493 and 7018502.

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, 1324 + ... + 3973.

It is an arithmetic number, because the mean of its divisors is an integer number (739071).

Almost surely, 27018525 is an apocalyptic number.

7018525 is the 1325-th decagonal number.

It is an amenable number.

7018525 is a deficient number, since it is larger than the sum of its proper divisors (1850327).

7018525 is a wasteful number, since it uses less digits than its factorization.

7018525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5360 (or 5355 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 7018525 is about 2649.2498938379. The cubic root of 7018525 is about 191.4617174939.

The spelling of 7018525 in words is "seven million, eighteen thousand, five hundred twenty-five".

Divisors: 1 5 25 53 265 1325 5297 26485 132425 280741 1403705 7018525