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13003005 = 357910973
BaseRepresentation
bin110001100110…
…100011111101
3220110121202210
4301212203331
511312044010
61142411033
7215344431
oct61464375
926417683
1013003005
117381394
124430a79
1329036b2
141a269c1
15121cb20
hexc668fd

13003005 has 16 divisors (see below), whose sum is σ = 21070080. Its totient is φ = 6846528.

The previous prime is 13002971. The next prime is 13003007. The reversal of 13003005 is 50030031.

It is a happy number.

It is not a de Polignac number, because 13003005 - 27 = 13002877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13003007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4302 + ... + 6671.

It is an arithmetic number, because the mean of its divisors is an integer number (1316880).

Almost surely, 213003005 is an apocalyptic number.

13003005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13003005 is a deficient number, since it is larger than the sum of its proper divisors (8067075).

13003005 is a wasteful number, since it uses less digits than its factorization.

13003005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11060.

The product of its (nonzero) digits is 45, while the sum is 12.

The square root of 13003005 is about 3605.9679699077. The cubic root of 13003005 is about 235.1515847115.

Adding to 13003005 its reverse (50030031), we get a palindrome (63033036).

The spelling of 13003005 in words is "thirteen million, three thousand, five".

Divisors: 1 3 5 15 79 237 395 1185 10973 32919 54865 164595 866867 2600601 4334335 13003005