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25015 = 55003
BaseRepresentation
bin110000110110111
31021022111
412012313
51300030
6311451
7132634
oct60667
937274
1025015
1117881
1212587
13b503
14918b
15762a
hex61b7

25015 has 4 divisors (see below), whose sum is σ = 30024. Its totient is φ = 20008.

The previous prime is 25013. The next prime is 25031. The reversal of 25015 is 51052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25015 - 21 = 25013 is a prime.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

25015 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 24986 and 25004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25013) 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, 2497 + ... + 2506.

It is an arithmetic number, because the mean of its divisors is an integer number (7506).

225015 is an apocalyptic number.

25015 is a deficient number, since it is larger than the sum of its proper divisors (5009).

25015 is an equidigital number, since it uses as much as digits as its factorization.

25015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 25015 is about 158.1613100603. The cubic root of 25015 is about 29.2460242484.

Adding to 25015 its reverse (51052), we get a palindrome (76067).

The spelling of 25015 in words is "twenty-five thousand, fifteen".

Divisors: 1 5 5003 25015