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12303641 = 71757663
BaseRepresentation
bin101110111011…
…110100011001
3212011002102102
4232323310121
511122204031
61115413145
7206402450
oct56736431
925132372
1012303641
116a439a9
1241541b5
13271a27c
1418c3b97
1511307cb
hexbbbd19

12303641 has 4 divisors (see below), whose sum is σ = 14061312. Its totient is φ = 10545972.

The previous prime is 12303637. The next prime is 12303653. The reversal of 12303641 is 14630321.

12303641 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14630321 = 67218363.

It is a cyclic number.

It is not a de Polignac number, because 12303641 - 22 = 12303637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12303691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878825 + ... + 878838.

It is an arithmetic number, because the mean of its divisors is an integer number (3515328).

Almost surely, 212303641 is an apocalyptic number.

It is an amenable number.

12303641 is a deficient number, since it is larger than the sum of its proper divisors (1757671).

12303641 is an equidigital number, since it uses as much as digits as its factorization.

12303641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757670.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 12303641 is about 3507.6546295210. The cubic root of 12303641 is about 230.8577987018.

Adding to 12303641 its reverse (14630321), we get a palindrome (26933962).

The spelling of 12303641 in words is "twelve million, three hundred three thousand, six hundred forty-one".

Divisors: 1 7 1757663 12303641