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13104925 = 52524197
BaseRepresentation
bin110001111111…
…011100011101
3220122210120121
4301333130131
511323324200
61144514541
7216250531
oct61773435
926583517
1013104925
117440a19
12447ba51
13293abc2
141a51bc1
15123ce1a
hexc7f71d

13104925 has 6 divisors (see below), whose sum is σ = 16250138. Its totient is φ = 10483920.

The previous prime is 13104913. The next prime is 13104929. The reversal of 13104925 is 52940131.

It can be written as a sum of positive squares in 3 ways, for example, as 3606201 + 9498724 = 1899^2 + 3082^2 .

It is not a de Polignac number, because 13104925 - 211 = 13102877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 524197 = 13104925 / (1 + 3 + 1 + 0 + 4 + 9 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13104925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13104929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 262074 + ... + 262123.

Almost surely, 213104925 is an apocalyptic number.

It is an amenable number.

13104925 is a deficient number, since it is larger than the sum of its proper divisors (3145213).

13104925 is an equidigital number, since it uses as much as digits as its factorization.

13104925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524207 (or 524202 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 13104925 is about 3620.0725130859. The cubic root of 13104925 is about 235.7643738938.

The spelling of 13104925 in words is "thirteen million, one hundred four thousand, nine hundred twenty-five".

Divisors: 1 5 25 524197 2620985 13104925