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12427243 = 65319031
BaseRepresentation
bin101111011001…
…111111101011
3212101100222021
4233121333223
511140132433
61122205311
7210426013
oct57317753
925340867
1012427243
117018854
1241b3837
1327615ca
141916c43
15115722d
hexbd9feb

12427243 has 4 divisors (see below), whose sum is σ = 12446928. Its totient is φ = 12407560.

The previous prime is 12427237. The next prime is 12427277. The reversal of 12427243 is 34272421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34272421 = 107320303.

It is a cyclic number.

It is not a de Polignac number, because 12427243 - 25 = 12427211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12427213) 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, 8863 + ... + 10168.

It is an arithmetic number, because the mean of its divisors is an integer number (3111732).

Almost surely, 212427243 is an apocalyptic number.

12427243 is a deficient number, since it is larger than the sum of its proper divisors (19685).

12427243 is an equidigital number, since it uses as much as digits as its factorization.

12427243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19684.

The product of its digits is 2688, while the sum is 25.

The square root of 12427243 is about 3525.2294960754. The cubic root of 12427243 is about 231.6282877840.

Adding to 12427243 its reverse (34272421), we get a palindrome (46699664).

The spelling of 12427243 in words is "twelve million, four hundred twenty-seven thousand, two hundred forty-three".

Divisors: 1 653 19031 12427243