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13235725 = 523891361
BaseRepresentation
bin110010011111…
…011000001101
3220220110000001
4302133120031
511342020400
61151404301
7220334056
oct62373015
926813001
1013235725
117520218
124523691
1329855b9
141a8772d
151266a6a
hexc9f60d

13235725 has 12 divisors (see below), whose sum is σ = 16466580. Its totient is φ = 10553600.

The previous prime is 13235713. The next prime is 13235731. The reversal of 13235725 is 52753231.

It can be written as a sum of positive squares in 6 ways, for example, as 2621161 + 10614564 = 1619^2 + 3258^2 .

It is not a de Polignac number, because 13235725 - 25 = 13235693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13235693 and 13235702.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 9045 + ... + 10405.

It is an arithmetic number, because the mean of its divisors is an integer number (1372215).

Almost surely, 213235725 is an apocalyptic number.

13235725 is the 1945-th nonagonal number.

It is an amenable number.

13235725 is a deficient number, since it is larger than the sum of its proper divisors (3230855).

13235725 is a wasteful number, since it uses less digits than its factorization.

13235725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760 (or 1755 counting only the distinct ones).

The product of its digits is 6300, while the sum is 28.

The square root of 13235725 is about 3638.0935941781. The cubic root of 13235725 is about 236.5461651540.

Adding to 13235725 its reverse (52753231), we get a palindrome (65988956).

The spelling of 13235725 in words is "thirteen million, two hundred thirty-five thousand, seven hundred twenty-five".

Divisors: 1 5 25 389 1361 1945 6805 9725 34025 529429 2647145 13235725