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13200725 = 521927791
BaseRepresentation
bin110010010110…
…110101010101
3220211122222202
4302112311111
511334410400
61150534245
7220130036
oct62266525
926748882
1013200725
1174a699a
124507385
1329726a5
141a78a8d
15125b4d5
hexc96d55

13200725 has 12 divisors (see below), whose sum is σ = 17231040. Its totient is φ = 10004400.

The previous prime is 13200709. The next prime is 13200727. The reversal of 13200725 is 52700231.

It is not a de Polignac number, because 13200725 - 24 = 13200709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13200697 and 13200706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13200727) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 13421 + ... + 14370.

It is an arithmetic number, because the mean of its divisors is an integer number (1435920).

Almost surely, 213200725 is an apocalyptic number.

It is an amenable number.

13200725 is a deficient number, since it is larger than the sum of its proper divisors (4030315).

13200725 is a wasteful number, since it uses less digits than its factorization.

13200725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27820 (or 27815 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 13200725 is about 3633.2801983882. The cubic root of 13200725 is about 236.3374768207.

Adding to 13200725 its reverse (52700231), we get a palindrome (65900956).

The spelling of 13200725 in words is "thirteen million, two hundred thousand, seven hundred twenty-five".

Divisors: 1 5 19 25 95 475 27791 138955 528029 694775 2640145 13200725