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12681741 = 34227247
BaseRepresentation
bin110000011000…
…001000001101
3212212022002010
4300120020031
511221303431
61131451433
7212536002
oct60301015
925768063
1012681741
117181a86
1242b6b79
1328203b7
1419818a9
1511a7846
hexc1820d

12681741 has 4 divisors (see below), whose sum is σ = 16908992. Its totient is φ = 8454492.

The previous prime is 12681727. The next prime is 12681743. The reversal of 12681741 is 14718621.

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: 14718621 = 34906207.

It is not a de Polignac number, because 12681741 - 25 = 12681709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12681699 and 12681708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12681743) 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, 2113621 + ... + 2113626.

It is an arithmetic number, because the mean of its divisors is an integer number (4227248).

Almost surely, 212681741 is an apocalyptic number.

It is an amenable number.

12681741 is a deficient number, since it is larger than the sum of its proper divisors (4227251).

12681741 is an equidigital number, since it uses as much as digits as its factorization.

12681741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227250.

The product of its digits is 2688, while the sum is 30.

The square root of 12681741 is about 3561.1432153172. The cubic root of 12681741 is about 233.1987902360.

The spelling of 12681741 in words is "twelve million, six hundred eighty-one thousand, seven hundred forty-one".

Divisors: 1 3 4227247 12681741