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13015601 = 37351773
BaseRepresentation
bin110001101001…
…101000110001
3220111021001022
4301221220301
511312444401
61142545225
7215426234
oct61515061
926437038
1013015601
11738a8a5
124438215
132909351
141a2b41b
15122171b
hexc69a31

13015601 has 4 divisors (see below), whose sum is σ = 13367412. Its totient is φ = 12663792.

The previous prime is 13015579. The next prime is 13015603. The reversal of 13015601 is 10651031.

13015601 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10651031 = 16996269.

It can be written as a sum of positive squares in 2 ways, for example, as 11122225 + 1893376 = 3335^2 + 1376^2 .

It is a cyclic number.

It is not a de Polignac number, because 13015601 - 26 = 13015537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13015601.

It is not an unprimeable number, because it can be changed into a prime (13015603) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 175850 + ... + 175923.

It is an arithmetic number, because the mean of its divisors is an integer number (3341853).

Almost surely, 213015601 is an apocalyptic number.

It is an amenable number.

13015601 is a deficient number, since it is larger than the sum of its proper divisors (351811).

13015601 is an equidigital number, since it uses as much as digits as its factorization.

13015601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351810.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 13015601 is about 3607.7140962111. The cubic root of 13015601 is about 235.2274905875.

Adding to 13015601 its reverse (10651031), we get a palindrome (23666632).

The spelling of 13015601 in words is "thirteen million, fifteen thousand, six hundred one".

Divisors: 1 37 351773 13015601