118521 has 12 divisors (see below), whose sum is σ = 184548. Its totient is φ = 72864.

The previous prime is 118493. The next prime is 118529. The reversal of 118521 is 125811.

It can be written as a sum of positive squares in 2 ways, for example, as 5625 + 112896 = 75^2 + 336^2 .

It is not a de Polignac number, because 118521 - 2⁶ = 118457 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 118494 and 118503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118529) 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, 390 + ... + 623.

It is an arithmetic number, because the mean of its divisors is an integer number (15379).

2¹¹⁸⁵²¹ is an apocalyptic number.

It is an amenable number.

118521 is a deficient number, since it is larger than the sum of its proper divisors (66027).

118521 is a wasteful number, since it uses less digits than its factorization.

118521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1029 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 118521 is about 344.2687903369. The cubic root of 118521 is about 49.1207627991.

The spelling of 118521 in words is "one hundred eighteen thousand, five hundred twenty-one".