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12980025 = 325257689
BaseRepresentation
bin110001100000…
…111100111001
3220102110020200
4301200330321
511310330100
61142112413
7215220432
oct61407471
926373220
1012980025
1173660a3
12441b709
1328c60b6
141a1c489
151215e00
hexc60f39

12980025 has 18 divisors (see below), whose sum is σ = 23249070. Its totient is φ = 6922560.

The previous prime is 12979987. The next prime is 12980029. The reversal of 12980025 is 52008921.

12980025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 41616 + 12938409 = 204^2 + 3597^2 .

It is not a de Polignac number, because 12980025 - 26 = 12979961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12980029) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28620 + ... + 29069.

It is an arithmetic number, because the mean of its divisors is an integer number (1291615).

Almost surely, 212980025 is an apocalyptic number.

12980025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12980025 is a deficient number, since it is larger than the sum of its proper divisors (10269045).

12980025 is a wasteful number, since it uses less digits than its factorization.

12980025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57705 (or 57697 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 12980025 is about 3602.7801764748. The cubic root of 12980025 is about 235.0129764979.

Adding to 12980025 its reverse (52008921), we get a palindrome (64988946).

The spelling of 12980025 in words is "twelve million, nine hundred eighty thousand, twenty-five".

Divisors: 1 3 5 9 15 25 45 75 225 57689 173067 288445 519201 865335 1442225 2596005 4326675 12980025