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12881401 = 131636079
BaseRepresentation
bin110001001000…
…110111111001
3220020102221221
4301020313321
511244201101
61140032041
7214330051
oct61106771
926212857
1012881401
1172a8a95
124392621
132890240
1419d4561
1511e6aa1
hexc48df9

12881401 has 8 divisors (see below), whose sum is σ = 13959680. Its totient is φ = 11815632.

The previous prime is 12881387. The next prime is 12881417. The reversal of 12881401 is 10418821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12881401 - 25 = 12881369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12881441) 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 7 ways as a sum of consecutive naturals, for example, 921 + ... + 5158.

It is an arithmetic number, because the mean of its divisors is an integer number (1744960).

Almost surely, 212881401 is an apocalyptic number.

It is an amenable number.

12881401 is a deficient number, since it is larger than the sum of its proper divisors (1078279).

12881401 is a wasteful number, since it uses less digits than its factorization.

12881401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6255.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 12881401 is about 3589.0668703717. The cubic root of 12881401 is about 234.4162423660.

The spelling of 12881401 in words is "twelve million, eight hundred eighty-one thousand, four hundred one".

Divisors: 1 13 163 2119 6079 79027 990877 12881401