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12131875 = 5474759
BaseRepresentation
bin101110010001…
…111000100011
3211211100210201
4232101320203
511101210000
61112010031
7205055620
oct56217043
924740721
1012131875
116936948
124090917
13268a032
14187b347
1510e996a
hexb91e23

12131875 has 40 divisors (see below), whose sum is σ = 17994240. Its totient is φ = 8004000.

The previous prime is 12131849. The next prime is 12131909. The reversal of 12131875 is 57813121.

12131875 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12131875 - 219 = 11607587 is a prime.

12131875 is strictly pandigital in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 205596 + ... + 205654.

It is an arithmetic number, because the mean of its divisors is an integer number (449856).

Almost surely, 212131875 is an apocalyptic number.

12131875 is a deficient number, since it is larger than the sum of its proper divisors (5862365).

12131875 is an frugal number, since it uses more digits than its factorization.

12131875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 118 counting only the distinct ones).

The product of its digits is 1680, while the sum is 28.

The square root of 12131875 is about 3483.0841218667. The cubic root of 12131875 is about 229.7784571192.

Adding to 12131875 its reverse (57813121), we get a palindrome (69944996).

The spelling of 12131875 in words is "twelve million, one hundred thirty-one thousand, eight hundred seventy-five".

Divisors: 1 5 7 25 35 47 59 125 175 235 295 329 413 625 875 1175 1475 1645 2065 2773 4375 5875 7375 8225 10325 13865 19411 29375 36875 41125 51625 69325 97055 205625 258125 346625 485275 1733125 2426375 12131875