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12838461 = 34279487
BaseRepresentation
bin110000111110…
…011000111101
3220011021001120
4300332120331
511241312321
61135101153
7214060626
oct60763075
926137046
1012838461
1172797a9
1243717b9
13287682c
1419c2a4d
1511d8ec6
hexc3e63d

12838461 has 4 divisors (see below), whose sum is σ = 17117952. Its totient is φ = 8558972.

The previous prime is 12838429. The next prime is 12838477. The reversal of 12838461 is 16483821.

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: 16483821 = 35494607.

It is a cyclic number.

It is not a de Polignac number, because 12838461 - 25 = 12838429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12838411) 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, 2139741 + ... + 2139746.

It is an arithmetic number, because the mean of its divisors is an integer number (4279488).

Almost surely, 212838461 is an apocalyptic number.

It is an amenable number.

12838461 is a deficient number, since it is larger than the sum of its proper divisors (4279491).

12838461 is an equidigital number, since it uses as much as digits as its factorization.

12838461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279490.

The product of its digits is 9216, while the sum is 33.

The square root of 12838461 is about 3583.0798204896. The cubic root of 12838461 is about 234.1554777958.

The spelling of 12838461 in words is "twelve million, eight hundred thirty-eight thousand, four hundred sixty-one".

Divisors: 1 3 4279487 12838461