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12684457 = 19241857
BaseRepresentation
bin110000011000…
…110010101001
3212212102210201
4300120302221
511221400312
61131512201
7212546632
oct60306251
925772721
1012684457
117184025
1242b8661
1328216c6
141982889
1511a8557
hexc18ca9

12684457 has 12 divisors (see below), whose sum is σ = 13729716. Its totient is φ = 11710080.

The previous prime is 12684449. The next prime is 12684467. The reversal of 12684457 is 75448621.

It can be written as a sum of positive squares in 2 ways, for example, as 6007401 + 6677056 = 2451^2 + 2584^2 .

It is not a de Polignac number, because 12684457 - 23 = 12684449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12684467) 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, 14373 + ... + 15229.

It is an arithmetic number, because the mean of its divisors is an integer number (1144143).

Almost surely, 212684457 is an apocalyptic number.

It is an amenable number.

12684457 is a deficient number, since it is larger than the sum of its proper divisors (1045259).

12684457 is an equidigital number, since it uses as much as digits as its factorization.

12684457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936 (or 917 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 12684457 is about 3561.5245331178. The cubic root of 12684457 is about 233.2154368122.

The spelling of 12684457 in words is "twelve million, six hundred eighty-four thousand, four hundred fifty-seven".

Divisors: 1 19 41 361 779 857 14801 16283 35137 309377 667603 12684457