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13062905 = 52990089
BaseRepresentation
bin110001110101…
…001011111001
3220120122221022
4301311023321
511321003110
61143552225
7216014162
oct61651371
926518838
1013062905
117412399
12445b675
132924a3b
141a40769
151230755
hexc752f9

13062905 has 8 divisors (see below), whose sum is σ = 16216200. Its totient is φ = 10089856.

The previous prime is 13062901. The next prime is 13062941. The reversal of 13062905 is 50926031.

It can be written as a sum of positive squares in 4 ways, for example, as 1860496 + 11202409 = 1364^2 + 3347^2 .

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 13062905 - 22 = 13062901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13062901) 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, 44900 + ... + 45189.

It is an arithmetic number, because the mean of its divisors is an integer number (2027025).

Almost surely, 213062905 is an apocalyptic number.

It is an amenable number.

13062905 is a deficient number, since it is larger than the sum of its proper divisors (3153295).

13062905 is an equidigital number, since it uses as much as digits as its factorization.

13062905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90123.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 13062905 is about 3614.2641021375. The cubic root of 13062905 is about 235.5121169142.

Adding to 13062905 its reverse (50926031), we get a palindrome (63988936).

The spelling of 13062905 in words is "thirteen million, sixty-two thousand, nine hundred five".

Divisors: 1 5 29 145 90089 450445 2612581 13062905