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8130245 = 515710357
BaseRepresentation
bin11111000000111011000101
3120022001121012
4133000323011
54040131440
6450132005
7126051224
oct37007305
916261535
108130245
114653412
122881005
1318b87c6
141118cbb
15aa8e65
hex7c0ec5

8130245 has 8 divisors (see below), whose sum is σ = 9819384. Its totient is φ = 6462144.

The previous prime is 8130193. The next prime is 8130251. The reversal of 8130245 is 5420318.

8130245 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 368449 + 7761796 = 607^2 + 2786^2 .

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 8130245 - 210 = 8129221 is a prime.

It is a super-2 number, since 2×81302452 = 132201767520050, which contains 22 as substring.

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 8130245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4394 + ... + 5963.

It is an arithmetic number, because the mean of its divisors is an integer number (1227423).

Almost surely, 28130245 is an apocalyptic number.

It is an amenable number.

8130245 is a deficient number, since it is larger than the sum of its proper divisors (1689139).

8130245 is a wasteful number, since it uses less digits than its factorization.

8130245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10519.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 8130245 is about 2851.3584481787. The cubic root of 8130245 is about 201.0795375097.

The spelling of 8130245 in words is "eight million, one hundred thirty thousand, two hundred forty-five".

Divisors: 1 5 157 785 10357 51785 1626049 8130245