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12857247 = 3213109891
BaseRepresentation
bin110001000010…
…111110011111
3220012012211100
4301002332133
511242412442
61135324143
7214166454
oct61027637
926165740
1012857247
117291927
124380653
132882250
1419c982b
1511de84c
hexc42f9f

12857247 has 12 divisors (see below), whose sum is σ = 20000344. Its totient is φ = 7912080.

The previous prime is 12857239. The next prime is 12857267. The reversal of 12857247 is 74275821.

12857247 is nontrivially palindromic in base 11.

12857247 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12857247 - 23 = 12857239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857267) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54829 + ... + 55062.

Almost surely, 212857247 is an apocalyptic number.

12857247 is a deficient number, since it is larger than the sum of its proper divisors (7143097).

12857247 is a wasteful number, since it uses less digits than its factorization.

12857247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109910 (or 109907 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 12857247 is about 3585.7003500014. The cubic root of 12857247 is about 234.2696322103.

It can be divided in two parts, 128 and 57247, that added together give a palindrome (57375).

The spelling of 12857247 in words is "twelve million, eight hundred fifty-seven thousand, two hundred forty-seven".

Divisors: 1 3 9 13 39 117 109891 329673 989019 1428583 4285749 12857247