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12748541 = 132513907
BaseRepresentation
bin110000101000…
…011011111101
3212222200201012
4300220123331
511230423131
61133125005
7213234521
oct60503375
925880635
1012748541
117218193
124329765
132844920
14199bd81
1511bc52b
hexc286fd

12748541 has 8 divisors (see below), whose sum is σ = 13787424. Its totient is φ = 11718000.

The previous prime is 12748513. The next prime is 12748553. The reversal of 12748541 is 14584721.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12748541 - 210 = 12747517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12748498 and 12748507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12748591) 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 7 ways as a sum of consecutive naturals, for example, 1310 + ... + 5216.

It is an arithmetic number, because the mean of its divisors is an integer number (1723428).

Almost surely, 212748541 is an apocalyptic number.

It is an amenable number.

12748541 is a deficient number, since it is larger than the sum of its proper divisors (1038883).

12748541 is a wasteful number, since it uses less digits than its factorization.

12748541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171.

The product of its digits is 8960, while the sum is 32.

The square root of 12748541 is about 3570.5099075622. The cubic root of 12748541 is about 233.6075250614.

The spelling of 12748541 in words is "twelve million, seven hundred forty-eight thousand, five hundred forty-one".

Divisors: 1 13 251 3263 3907 50791 980657 12748541