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13012407 = 3553549
BaseRepresentation
bin110001101000…
…110110110111
3220111002200000
4301220312313
511312344112
61142522343
7215414022
oct61506667
926432600
1013012407
117388461
1244363b3
132907a65
141a2a1b9
1512207dc
hexc68db7

13012407 has 12 divisors (see below), whose sum is σ = 19492200. Its totient is φ = 8674776.

The previous prime is 13012403. The next prime is 13012409. The reversal of 13012407 is 70421031.

It is not a de Polignac number, because 13012407 - 22 = 13012403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13012407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26532 + ... + 27017.

It is an arithmetic number, because the mean of its divisors is an integer number (1624350).

Almost surely, 213012407 is an apocalyptic number.

13012407 is a deficient number, since it is larger than the sum of its proper divisors (6479793).

13012407 is an frugal number, since it uses more digits than its factorization.

13012407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53564 (or 53552 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 13012407 is about 3607.2714064789. The cubic root of 13012407 is about 235.2082475763.

Adding to 13012407 its reverse (70421031), we get a palindrome (83433438).

The spelling of 13012407 in words is "thirteen million, twelve thousand, four hundred seven".

Divisors: 1 3 9 27 81 243 53549 160647 481941 1445823 4337469 13012407