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13012085 = 52602417
BaseRepresentation
bin110001101000…
…110001110101
3220111002020002
4301220301311
511312341320
61142521045
7215413052
oct61506165
926432202
1013012085
117388199
124436185
132907878
141a2a029
151220675
hexc68c75

13012085 has 4 divisors (see below), whose sum is σ = 15614508. Its totient is φ = 10409664.

The previous prime is 13012081. The next prime is 13012117. The reversal of 13012085 is 58021031.

13012085 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: 58021031 = 197294523.

It can be written as a sum of positive squares in 2 ways, for example, as 6345361 + 6666724 = 2519^2 + 2582^2 .

It is a cyclic number.

It is not a de Polignac number, because 13012085 - 22 = 13012081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012081) 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, 1301204 + ... + 1301213.

It is an arithmetic number, because the mean of its divisors is an integer number (3903627).

Almost surely, 213012085 is an apocalyptic number.

It is an amenable number.

13012085 is a deficient number, since it is larger than the sum of its proper divisors (2602423).

13012085 is an equidigital number, since it uses as much as digits as its factorization.

13012085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602422.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 13012085 is about 3607.2267741300. The cubic root of 13012085 is about 235.2063074361.

The spelling of 13012085 in words is "thirteen million, twelve thousand, eighty-five".

Divisors: 1 5 2602417 13012085