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12804901 = 28345247
BaseRepresentation
bin110000110110…
…001100100101
3220002120000121
4300312030211
511234224101
61134241541
7213561034
oct60661445
926076017
1012804901
11725656a
1243562b1
132864485
1419b471b
1511ce0a1
hexc36325

12804901 has 4 divisors (see below), whose sum is σ = 12850432. Its totient is φ = 12759372.

The previous prime is 12804877. The next prime is 12804907. The reversal of 12804901 is 10940821.

It is a happy number.

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: 10940821 = 19954979.

It is a cyclic number.

It is not a de Polignac number, because 12804901 - 27 = 12804773 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 (12804907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22341 + ... + 22906.

It is an arithmetic number, because the mean of its divisors is an integer number (3212608).

Almost surely, 212804901 is an apocalyptic number.

It is an amenable number.

12804901 is a deficient number, since it is larger than the sum of its proper divisors (45531).

12804901 is an equidigital number, since it uses as much as digits as its factorization.

12804901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45530.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12804901 is about 3578.3936340207. The cubic root of 12804901 is about 233.9512706868.

The spelling of 12804901 in words is "twelve million, eight hundred four thousand, nine hundred one".

Divisors: 1 283 45247 12804901