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12897569 is a prime number
BaseRepresentation
bin110001001100…
…110100100001
3220021021010202
4301030310201
511300210234
61140234545
7214425146
oct61146441
926237122
1012897569
11730a153
12439ba55
1328976c9
1419da3cd
1511eb77e
hexc4cd21

12897569 has 2 divisors, whose sum is σ = 12897570. Its totient is φ = 12897568.

The previous prime is 12897559. The next prime is 12897583. The reversal of 12897569 is 96579821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9333025 + 3564544 = 3055^2 + 1888^2 .

It is a cyclic number.

It is not a de Polignac number, because 12897569 - 212 = 12893473 is a prime.

It is a super-2 number, since 2×128975692 = 332694572219522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12897529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6448784 + 6448785.

It is an arithmetic number, because the mean of its divisors is an integer number (6448785).

Almost surely, 212897569 is an apocalyptic number.

It is an amenable number.

12897569 is a deficient number, since it is larger than the sum of its proper divisors (1).

12897569 is an equidigital number, since it uses as much as digits as its factorization.

12897569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 12897569 is about 3591.3185600835. The cubic root of 12897569 is about 234.5142766618.

The spelling of 12897569 in words is "twelve million, eight hundred ninety-seven thousand, five hundred sixty-nine".