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13061285 = 52612257
BaseRepresentation
bin110001110100…
…110010100101
3220120120201022
4301310302211
511320430120
61143540525
7216006356
oct61646245
926516638
1013061285
117411156
12445a745
132924093
141a3dd2d
151230025
hexc74ca5

13061285 has 4 divisors (see below), whose sum is σ = 15673548. Its totient is φ = 10449024.

The previous prime is 13061249. The next prime is 13061291. The reversal of 13061285 is 58216031.

13061285 is digitally balanced in base 2, 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: 58216031 = 142940739.

It can be written as a sum of positive squares in 2 ways, for example, as 4761124 + 8300161 = 2182^2 + 2881^2 .

It is a cyclic number.

It is not a de Polignac number, because 13061285 - 28 = 13061029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1306124 + ... + 1306133.

It is an arithmetic number, because the mean of its divisors is an integer number (3918387).

Almost surely, 213061285 is an apocalyptic number.

It is an amenable number.

13061285 is a deficient number, since it is larger than the sum of its proper divisors (2612263).

13061285 is an equidigital number, since it uses as much as digits as its factorization.

13061285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612262.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 13061285 is about 3614.0399831767. The cubic root of 13061285 is about 235.5023808103.

The spelling of 13061285 in words is "thirteen million, sixty-one thousand, two hundred eighty-five".

Divisors: 1 5 2612257 13061285