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1206808025 = 52131368491
BaseRepresentation
bin100011111101110…
…0110110111011001
310010002211012101112
41013323212313121
54432420324100
6315430030105
741622461513
oct10773466731
93102735345
101206808025
1156a236805
122981a8335
131630391b7
14b63c2bb3
1570e32b35
hex47ee6dd9

1206808025 has 12 divisors (see below), whose sum is σ = 1507869264. Its totient is φ = 958074000.

The previous prime is 1206807991. The next prime is 1206808027. The reversal of 1206808025 is 5208086021.

It is not a de Polignac number, because 1206808025 - 210 = 1206807001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1206807982 and 1206808000.

It is not an unprimeable number, because it can be changed into a prime (1206808027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180971 + ... + 187520.

It is an arithmetic number, because the mean of its divisors is an integer number (125655772).

Almost surely, 21206808025 is an apocalyptic number.

It is an amenable number.

1206808025 is a deficient number, since it is larger than the sum of its proper divisors (301061239).

1206808025 is a wasteful number, since it uses less digits than its factorization.

1206808025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368632 (or 368627 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1206808025 is about 34739.1425484280. The cubic root of 1206808025 is about 1064.6643935079.

The spelling of 1206808025 in words is "one billion, two hundred six million, eight hundred eight thousand, twenty-five".

Divisors: 1 5 25 131 655 3275 368491 1842455 9212275 48272321 241361605 1206808025