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13145057 = 431072857
BaseRepresentation
bin110010001001…
…001111100001
3220201211121222
4302021033201
511331120212
61145424425
7216505532
oct62111741
926654558
1013145057
117469092
12449b115
132953253
141a62689
151249c72
hexc893e1

13145057 has 8 divisors (see below), whose sum is σ = 13581216. Its totient is φ = 12714912.

The previous prime is 13145053. The next prime is 13145081. The reversal of 13145057 is 75054131.

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 13145057 - 22 = 13145053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13145053) 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 7 ways as a sum of consecutive naturals, for example, 3173 + ... + 6029.

It is an arithmetic number, because the mean of its divisors is an integer number (1697652).

Almost surely, 213145057 is an apocalyptic number.

It is an amenable number.

13145057 is a deficient number, since it is larger than the sum of its proper divisors (436159).

13145057 is a wasteful number, since it uses less digits than its factorization.

13145057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 13145057 is about 3625.6112588086. The cubic root of 13145057 is about 236.0047937837.

Adding to 13145057 its reverse (75054131), we get a palindrome (88199188).

The spelling of 13145057 in words is "thirteen million, one hundred forty-five thousand, fifty-seven".

Divisors: 1 43 107 2857 4601 122851 305699 13145057