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12881853 = 321431317
BaseRepresentation
bin110001001000…
…111110111101
3220020110120200
4301020332331
511244204403
61140034113
7214331265
oct61107675
926213520
1012881853
1172a9366
124392939
1328904ca
1419d47a5
1511e6ca3
hexc48fbd

12881853 has 6 divisors (see below), whose sum is σ = 18607134. Its totient is φ = 8587896.

The previous prime is 12881839. The next prime is 12881899. The reversal of 12881853 is 35818821.

It can be written as a sum of positive squares in only one way, i.e., 7601049 + 5280804 = 2757^2 + 2298^2 .

It is not a de Polignac number, because 12881853 - 26 = 12881789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12888853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 715650 + ... + 715667.

It is an arithmetic number, because the mean of its divisors is an integer number (3101189).

Almost surely, 212881853 is an apocalyptic number.

It is an amenable number.

12881853 is a deficient number, since it is larger than the sum of its proper divisors (5725281).

12881853 is a wasteful number, since it uses less digits than its factorization.

12881853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431323 (or 1431320 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 12881853 is about 3589.1298388328. The cubic root of 12881853 is about 234.4189841718.

The spelling of 12881853 in words is "twelve million, eight hundred eighty-one thousand, eight hundred fifty-three".

Divisors: 1 3 9 1431317 4293951 12881853