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5206805 = 529149241
BaseRepresentation
bin10011110111001100010101
3100210112101122
4103313030111
52313104210
6303333325
762154122
oct23671425
910715348
105206805
112a36a4a
1218b1245
131103c66
14997749
156ccb55
hex4f7315

5206805 has 16 divisors (see below), whose sum is σ = 6534000. Its totient is φ = 3978240.

The previous prime is 5206793. The next prime is 5206819. The reversal of 5206805 is 5086025.

It can be written as a sum of positive squares in 8 ways, for example, as 108241 + 5098564 = 329^2 + 2258^2 .

It is not a de Polignac number, because 5206805 - 212 = 5202709 is a prime.

It is a super-2 number, since 2×52068052 = 54221636616050, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21485 + ... + 21725.

It is an arithmetic number, because the mean of its divisors is an integer number (408375).

Almost surely, 25206805 is an apocalyptic number.

It is an amenable number.

5206805 is a deficient number, since it is larger than the sum of its proper divisors (1327195).

5206805 is a wasteful number, since it uses less digits than its factorization.

5206805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 5206805 is about 2281.8424573138. The cubic root of 5206805 is about 173.3233619346.

The spelling of 5206805 in words is "five million, two hundred six thousand, eight hundred five".

Divisors: 1 5 29 145 149 241 745 1205 4321 6989 21605 34945 35909 179545 1041361 5206805