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125065 = 525013
BaseRepresentation
bin11110100010001001
320100120001
4132202021
513000230
62403001
71030423
oct364211
9210501
10125065
1185a66
1260461
1344c05
1433813
15270ca
hex1e889

125065 has 4 divisors (see below), whose sum is σ = 150084. Its totient is φ = 100048.

The previous prime is 125063. The next prime is 125093. The reversal of 125065 is 560521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560521 = 1343117.

It can be written as a sum of positive squares in 2 ways, for example, as 95481 + 29584 = 309^2 + 172^2 .

It is a cyclic number.

It is not a de Polignac number, because 125065 - 21 = 125063 is a prime.

It is a Duffinian number.

125065 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (125063) 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, 12502 + ... + 12511.

It is an arithmetic number, because the mean of its divisors is an integer number (37521).

125065 is a Friedman number, since it can be written as 65+50^(2+1), using all its digits and the basic arithmetic operations.

2125065 is an apocalyptic number.

It is an amenable number.

125065 is a deficient number, since it is larger than the sum of its proper divisors (25019).

125065 is an equidigital number, since it uses as much as digits as its factorization.

125065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25018.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 125065 is about 353.6453025278. The cubic root of 125065 is about 50.0086651649.

Adding to 125065 its reverse (560521), we get a palindrome (685586).

The spelling of 125065 in words is "one hundred twenty-five thousand, sixty-five".

Divisors: 1 5 25013 125065