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121525 = 524861
BaseRepresentation
bin11101101010110101
320011200221
4131222311
512342100
62334341
71014205
oct355265
9204627
10121525
1183338
125a3b1
1343411
1432405
152601a
hex1dab5

121525 has 6 divisors (see below), whose sum is σ = 150722. Its totient is φ = 97200.

The previous prime is 121523. The next prime is 121531. The reversal of 121525 is 525121.

Adding to 121525 its reverse (525121), we get a palindrome (646646).

It can be divided in two parts, 121 and 525, that added together give a palindrome (646).

121525 = 2462 + 2472.

121525 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 3 ways, for example, as 27889 + 93636 = 167^2 + 306^2 .

It is not a de Polignac number, because 121525 - 21 = 121523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121499 and 121508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2406 + ... + 2455.

2121525 is an apocalyptic number.

121525 is the 247-th centered square number.

It is an amenable number.

121525 is a deficient number, since it is larger than the sum of its proper divisors (29197).

121525 is an equidigital number, since it uses as much as digits as its factorization.

121525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4871 (or 4866 counting only the distinct ones).

The product of its digits is 100, while the sum is 16.

The square root of 121525 is about 348.6043602711. The cubic root of 121525 is about 49.5323055449.

The spelling of 121525 in words is "one hundred twenty-one thousand, five hundred twenty-five".

Divisors: 1 5 25 4861 24305 121525