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12634831 = 111148621
BaseRepresentation
bin110000001100…
…101011001111
3212202220201201
4300030223033
511213303311
61130450331
7212252146
oct60145317
925686651
1012634831
11714a810
1242939a7
132804c41
14196c75d
1511989c1
hexc0cacf

12634831 has 4 divisors (see below), whose sum is σ = 13783464. Its totient is φ = 11486200.

The previous prime is 12634799. The next prime is 12634861. The reversal of 12634831 is 13843621.

12634831 is digitally balanced in base 2, 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 an emirpimes, since its reverse is a distinct semiprime: 13843621 = 111258511.

It is not a de Polignac number, because 12634831 - 25 = 12634799 is a prime.

It is a super-2 number, since 2×126348312 = 319277908797122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12634831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12634861) 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, 574300 + ... + 574321.

It is an arithmetic number, because the mean of its divisors is an integer number (3445866).

Almost surely, 212634831 is an apocalyptic number.

12634831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12634831 is a deficient number, since it is larger than the sum of its proper divisors (1148633).

12634831 is a wasteful number, since it uses less digits than its factorization.

12634831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148632.

The product of its digits is 3456, while the sum is 28.

The square root of 12634831 is about 3554.5507451716. The cubic root of 12634831 is about 232.9108993928.

The spelling of 12634831 in words is "twelve million, six hundred thirty-four thousand, eight hundred thirty-one".

Divisors: 1 11 1148621 12634831