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12580489 = 19234849
BaseRepresentation
bin101111111111…
…011010001001
3212200011012001
4233333122021
511210033424
61125351001
7211634545
oct57773211
925604161
1012580489
1171129a9
124268461
1327b629c
141956a25
151187844
hexbff689

12580489 has 6 divisors (see below), whose sum is σ = 13277850. Its totient is φ = 11918016.

The previous prime is 12580487. The next prime is 12580499. The reversal of 12580489 is 98408521.

It can be written as a sum of positive squares in only one way, i.e., 7382089 + 5198400 = 2717^2 + 2280^2 .

It is not a de Polignac number, because 12580489 - 21 = 12580487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12580483) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17064 + ... + 17785.

It is an arithmetic number, because the mean of its divisors is an integer number (2212975).

Almost surely, 212580489 is an apocalyptic number.

12580489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12580489 is a deficient number, since it is larger than the sum of its proper divisors (697361).

12580489 is an equidigital number, since it uses as much as digits as its factorization.

12580489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34887 (or 34868 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 12580489 is about 3546.8985043274. The cubic root of 12580489 is about 232.5765054428.

The spelling of 12580489 in words is "twelve million, five hundred eighty thousand, four hundred eighty-nine".

Divisors: 1 19 361 34849 662131 12580489