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13135625 = 5421017
BaseRepresentation
bin110010000110…
…111100001001
3220201100200122
4302012330021
511330320000
61145313025
7216436166
oct62067411
926640618
1013135625
117461a98
124495775
13294bb79
141a5d06d
151247085
hexc86f09

13135625 has 10 divisors (see below), whose sum is σ = 16415058. Its totient is φ = 10508000.

The previous prime is 13135613. The next prime is 13135649. The reversal of 13135625 is 52653131.

It can be written as a sum of positive squares in 5 ways, for example, as 9935104 + 3200521 = 3152^2 + 1789^2 .

It is not a de Polignac number, because 13135625 - 212 = 13131529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13135594 and 13135603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9884 + ... + 11133.

Almost surely, 213135625 is an apocalyptic number.

It is an amenable number.

13135625 is a deficient number, since it is larger than the sum of its proper divisors (3279433).

13135625 is an frugal number, since it uses more digits than its factorization.

13135625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21037 (or 21022 counting only the distinct ones).

The product of its digits is 2700, while the sum is 26.

The square root of 13135625 is about 3624.3102792118. The cubic root of 13135625 is about 235.9483332745.

Adding to 13135625 its reverse (52653131), we get a palindrome (65788756).

The spelling of 13135625 in words is "thirteen million, one hundred thirty-five thousand, six hundred twenty-five".

Divisors: 1 5 25 125 625 21017 105085 525425 2627125 13135625