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12901285 = 519139977
BaseRepresentation
bin110001001101…
…101110100101
3220021110020101
4301031232211
511300320120
61140304101
7214442035
oct61155645
926243211
1012901285
117311a21
1243a2031
1328992c7
1419db8c5
1511ec90a
hexc4dba5

12901285 has 16 divisors (see below), whose sum is σ = 16430400. Its totient is φ = 9697536.

The previous prime is 12901279. The next prime is 12901297. The reversal of 12901285 is 58210921.

It is a cyclic number.

It is not a de Polignac number, because 12901285 - 23 = 12901277 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12717 + ... + 13693.

It is an arithmetic number, because the mean of its divisors is an integer number (1026900).

Almost surely, 212901285 is an apocalyptic number.

It is an amenable number.

12901285 is a deficient number, since it is larger than the sum of its proper divisors (3529115).

12901285 is a wasteful number, since it uses less digits than its factorization.

12901285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12901285 is about 3591.8358815514. The cubic root of 12901285 is about 234.5367969619.

The spelling of 12901285 in words is "twelve million, nine hundred one thousand, two hundred eighty-five".

Divisors: 1 5 19 95 139 695 977 2641 4885 13205 18563 92815 135803 679015 2580257 12901285