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13048405 = 52989989
BaseRepresentation
bin110001110001…
…101001010101
3220112221001021
4301301221111
511320022110
61143401141
7215623666
oct61615125
926487037
1013048405
117402507
1244531b1
13291b266
141a3936d
15122b2da
hexc71a55

13048405 has 8 divisors (see below), whose sum is σ = 16198200. Its totient is φ = 10078656.

The previous prime is 13048403. The next prime is 13048411. The reversal of 13048405 is 50484031.

13048405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 381924 + 12666481 = 618^2 + 3559^2 .

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 13048405 - 21 = 13048403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13048405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13048403) 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, 44850 + ... + 45139.

It is an arithmetic number, because the mean of its divisors is an integer number (2024775).

Almost surely, 213048405 is an apocalyptic number.

It is an amenable number.

13048405 is a deficient number, since it is larger than the sum of its proper divisors (3149795).

13048405 is an equidigital number, since it uses as much as digits as its factorization.

13048405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90023.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 13048405 is about 3612.2576043245. The cubic root of 13048405 is about 235.4249441142.

The spelling of 13048405 in words is "thirteen million, forty-eight thousand, four hundred five".

Divisors: 1 5 29 145 89989 449945 2609681 13048405