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12881130 = 2351393089
BaseRepresentation
bin110001001000…
…110011101010
3220020102120220
4301020303222
511244144010
61140030510
7214326213
oct61106352
926212526
1012881130
1172a8869
124392436
132890092
1419d440a
1511e6970
hexc48cea

12881130 has 32 divisors (see below), whose sum is σ = 31147200. Its totient is φ = 3409152.

The previous prime is 12881119. The next prime is 12881131. The reversal of 12881130 is 3118821.

It is a self number, because there is not a number n which added to its sum of digits gives 12881130.

It is not an unprimeable number, because it can be changed into a prime (12881131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2626 + ... + 5714.

It is an arithmetic number, because the mean of its divisors is an integer number (973350).

Almost surely, 212881130 is an apocalyptic number.

12881130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12881130 is an abundant number, since it is smaller than the sum of its proper divisors (18266070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12881130 is a wasteful number, since it uses less digits than its factorization.

12881130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 12881130 is about 3589.0291166275. The cubic root of 12881130 is about 234.4145984649.

Adding to 12881130 its reverse (3118821), we get a palindrome (15999951).

The spelling of 12881130 in words is "twelve million, eight hundred eighty-one thousand, one hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 139 278 417 695 834 1390 2085 3089 4170 6178 9267 15445 18534 30890 46335 92670 429371 858742 1288113 2146855 2576226 4293710 6440565 12881130