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15125 = 53112
BaseRepresentation
bin11101100010101
3202202012
43230111
5441000
6154005
762045
oct35425
922665
1015125
1110400
128905
136b66
145725
154735
hex3b15

15125 has 12 divisors (see below), whose sum is σ = 20748. Its totient is φ = 11000.

The previous prime is 15121. The next prime is 15131. The reversal of 15125 is 52151.

15125 = 702 + 712 + 722.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 484 + 14641 = 22^2 + 121^2 .

It is not a de Polignac number, because 15125 - 22 = 15121 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1370 + ... + 1380.

It is an arithmetic number, because the mean of its divisors is an integer number (1729).

15125 is a Friedman number, since it can be written as 5*(11*5)^2, using all its digits and the basic arithmetic operations.

215125 is an apocalyptic number.

It is an amenable number.

15125 is a deficient number, since it is larger than the sum of its proper divisors (5623).

15125 is an equidigital number, since it uses as much as digits as its factorization.

15125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37 (or 16 counting only the distinct ones).

The product of its digits is 50, while the sum is 14.

The square root of 15125 is about 122.9837387625. The cubic root of 15125 is about 24.7304372162.

Adding to 15125 its reverse (52151), we get a palindrome (67276).

The spelling of 15125 in words is "fifteen thousand, one hundred twenty-five".

Divisors: 1 5 11 25 55 121 125 275 605 1375 3025 15125