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12519085 = 52503817
BaseRepresentation
bin101111110000…
…011010101101
3212120000221211
4233300122231
511201102320
61124154421
7211260535
oct57603255
925500854
1012519085
117080857
124238a11
132794357
14193c4c5
15117455a
hexbf06ad

12519085 has 4 divisors (see below), whose sum is σ = 15022908. Its totient is φ = 10015264.

The previous prime is 12519083. The next prime is 12519113. The reversal of 12519085 is 58091521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58091521 = 83969239.

It can be written as a sum of positive squares in 2 ways, for example, as 3928324 + 8590761 = 1982^2 + 2931^2 .

It is a cyclic number.

It is not a de Polignac number, because 12519085 - 21 = 12519083 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12519083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1251904 + ... + 1251913.

It is an arithmetic number, because the mean of its divisors is an integer number (3755727).

Almost surely, 212519085 is an apocalyptic number.

It is an amenable number.

12519085 is a deficient number, since it is larger than the sum of its proper divisors (2503823).

12519085 is an equidigital number, since it uses as much as digits as its factorization.

12519085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503822.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 12519085 is about 3538.2319030838. The cubic root of 12519085 is about 232.1974945838.

The spelling of 12519085 in words is "twelve million, five hundred nineteen thousand, eighty-five".

Divisors: 1 5 2503817 12519085