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13025140 = 225651257
BaseRepresentation
bin110001101011…
…111101110100
3220111202010121
4301223331310
511313301030
61143101324
7215466112
oct61537564
926452117
1013025140
117396a87
124441844
1329107ab
141a30ab2
15122447a
hexc6bf74

13025140 has 12 divisors (see below), whose sum is σ = 27352836. Its totient is φ = 5210048.

The previous prime is 13025137. The next prime is 13025141. The reversal of 13025140 is 4152031.

It can be written as a sum of positive squares in 2 ways, for example, as 5207524 + 7817616 = 2282^2 + 2796^2 .

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13025141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325609 + ... + 325648.

It is an arithmetic number, because the mean of its divisors is an integer number (2279403).

Almost surely, 213025140 is an apocalyptic number.

13025140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13025140 is an abundant number, since it is smaller than the sum of its proper divisors (14327696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13025140 is a wasteful number, since it uses less digits than its factorization.

13025140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651266 (or 651264 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 13025140 is about 3609.0358823376. The cubic root of 13025140 is about 235.2849418235.

Adding to 13025140 its reverse (4152031), we get a palindrome (17177171).

The spelling of 13025140 in words is "thirteen million, twenty-five thousand, one hundred forty".

Divisors: 1 2 4 5 10 20 651257 1302514 2605028 3256285 6512570 13025140