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13000045 = 57013709
BaseRepresentation
bin110001100101…
…110101101101
3220110110201011
4301211311231
511312000140
61142345221
7215333002
oct61456555
926413634
1013000045
11737a143
12442b211
132902246
141a258a9
15121bcea
hexc65d6d

13000045 has 8 divisors (see below), whose sum is σ = 15626520. Its totient is φ = 10382400.

The previous prime is 13000027. The next prime is 13000049. The reversal of 13000045 is 54000031.

It can be written as a sum of positive squares in 4 ways, for example, as 1990921 + 11009124 = 1411^2 + 3318^2 .

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

It is not a de Polignac number, because 13000045 - 29 = 12999533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12999989 and 13000034.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13000049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1651 + ... + 5359.

It is an arithmetic number, because the mean of its divisors is an integer number (1953315).

Almost surely, 213000045 is an apocalyptic number.

It is an amenable number.

13000045 is a deficient number, since it is larger than the sum of its proper divisors (2626475).

13000045 is an equidigital number, since it uses as much as digits as its factorization.

13000045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 13000045 is about 3605.5575158358. The cubic root of 13000045 is about 235.1337400796.

Adding to 13000045 its reverse (54000031), we get a palindrome (67000076).

The spelling of 13000045 in words is "thirteen million, forty-five", and thus it is an aban number and an uban number.

Divisors: 1 5 701 3505 3709 18545 2600009 13000045