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8130145 = 51998171
BaseRepresentation
bin11111000000111001100001
3120022001110111
4133000321201
54040131040
6450131321
7126051022
oct37007141
916261414
108130145
114653331
122880b41
1318b874a
141118c49
15aa8dea
hex7c0e61

8130145 has 8 divisors (see below), whose sum is σ = 9806400. Its totient is φ = 6470640.

The previous prime is 8130137. The next prime is 8130149. The reversal of 8130145 is 5410318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8130145 - 23 = 8130137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8130149) 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, 3091 + ... + 5080.

It is an arithmetic number, because the mean of its divisors is an integer number (1225800).

Almost surely, 28130145 is an apocalyptic number.

It is an amenable number.

8130145 is a deficient number, since it is larger than the sum of its proper divisors (1676255).

8130145 is a wasteful number, since it uses less digits than its factorization.

8130145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8375.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 8130145 is about 2851.3409126234. The cubic root of 8130145 is about 201.0787130968.

The spelling of 8130145 in words is "eight million, one hundred thirty thousand, one hundred forty-five".

Divisors: 1 5 199 995 8171 40855 1626029 8130145