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15000245 = 513230773
BaseRepresentation
bin111001001110…
…001010110101
31001020002110122
4321032022311
512320001440
61253301325
7241333331
oct71161265
931202418
1015000245
1185159a7
125034845
1331527b0
141dc67c1
1514b47b5
hexe4e2b5

15000245 has 8 divisors (see below), whose sum is σ = 19385016. Its totient is φ = 11077056.

The previous prime is 15000233. The next prime is 15000257. The reversal of 15000245 is 54200051.

It is an interprime number because it is at equal distance from previous prime (15000233) and next prime (15000257).

It can be written as a sum of positive squares in 4 ways, for example, as 54289 + 14945956 = 233^2 + 3866^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 15000245 - 210 = 14999221 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 115322 + ... + 115451.

It is an arithmetic number, because the mean of its divisors is an integer number (2423127).

Almost surely, 215000245 is an apocalyptic number.

It is an amenable number.

15000245 is a deficient number, since it is larger than the sum of its proper divisors (4384771).

15000245 is a wasteful number, since it uses less digits than its factorization.

15000245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230791.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 15000245 is about 3873.0149754423. The cubic root of 15000245 is about 246.6225501412.

Adding to 15000245 its reverse (54200051), we get a palindrome (69200296).

The spelling of 15000245 in words is "fifteen million, two hundred forty-five", and thus it is an aban number.

Divisors: 1 5 13 65 230773 1153865 3000049 15000245