Search a number
-
+
12805351 = 13985027
BaseRepresentation
bin110000110110…
…010011100111
3220002120122021
4300312103213
511234232401
61134244011
7213562246
oct60662347
926076567
1012805351
117256939
124356607
132864740
1419b495d
1511ce2a1
hexc364e7

12805351 has 4 divisors (see below), whose sum is σ = 13790392. Its totient is φ = 11820312.

The previous prime is 12805349. The next prime is 12805417. The reversal of 12805351 is 15350821.

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: 15350821 = 23667427.

It is a cyclic number.

It is not a de Polignac number, because 12805351 - 21 = 12805349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12806351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492501 + ... + 492526.

It is an arithmetic number, because the mean of its divisors is an integer number (3447598).

Almost surely, 212805351 is an apocalyptic number.

12805351 is a deficient number, since it is larger than the sum of its proper divisors (985041).

12805351 is an equidigital number, since it uses as much as digits as its factorization.

12805351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985040.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 12805351 is about 3578.4565108437. The cubic root of 12805351 is about 233.9540112218.

The spelling of 12805351 in words is "twelve million, eight hundred five thousand, three hundred fifty-one".

Divisors: 1 13 985027 12805351