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12868401 = 371347137
BaseRepresentation
bin110001000101…
…101100110001
3220012210010110
4301011230301
511243242101
61135451533
7214244130
oct61055461
926183113
1012868401
11729a247
124386ba9
132887350
1419cd917
1511e2cd6
hexc45b31

12868401 has 16 divisors (see below), whose sum is σ = 21117824. Its totient is φ = 6787584.

The previous prime is 12868399. The next prime is 12868411. The reversal of 12868401 is 10486821.

It is not a de Polignac number, because 12868401 - 21 = 12868399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12868411) 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, 23296 + ... + 23841.

It is an arithmetic number, because the mean of its divisors is an integer number (1319864).

Almost surely, 212868401 is an apocalyptic number.

It is an amenable number.

12868401 is a deficient number, since it is larger than the sum of its proper divisors (8249423).

12868401 is a wasteful number, since it uses less digits than its factorization.

12868401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47160.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 12868401 is about 3587.2553575122. The cubic root of 12868401 is about 234.3373576525.

The spelling of 12868401 in words is "twelve million, eight hundred sixty-eight thousand, four hundred one".

Divisors: 1 3 7 13 21 39 91 273 47137 141411 329959 612781 989877 1838343 4289467 12868401