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13225261 = 73974759
BaseRepresentation
bin110010011100…
…110100101101
3220212220122111
4302130310231
511341202021
61151244021
7220261420
oct62346455
926786574
1013225261
117513375
124519611
1329808ca
141a839b7
1512638e1
hexc9cd2d

13225261 has 8 divisors (see below), whose sum is σ = 15155840. Its totient is φ = 11305008.

The previous prime is 13225259. The next prime is 13225279. The reversal of 13225261 is 16252231.

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 13225261 - 21 = 13225259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13225291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400 + ... + 5158.

It is an arithmetic number, because the mean of its divisors is an integer number (1894480).

Almost surely, 213225261 is an apocalyptic number.

It is an amenable number.

13225261 is a deficient number, since it is larger than the sum of its proper divisors (1930579).

13225261 is an equidigital number, since it uses as much as digits as its factorization.

13225261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5163.

The product of its digits is 720, while the sum is 22.

The square root of 13225261 is about 3636.6551939935. The cubic root of 13225261 is about 236.4838118979.

Adding to 13225261 its reverse (16252231), we get a palindrome (29477492).

The spelling of 13225261 in words is "thirteen million, two hundred twenty-five thousand, two hundred sixty-one".

Divisors: 1 7 397 2779 4759 33313 1889323 13225261