659121 has 4 divisors (see below), whose sum is σ = 878832. Its totient is φ = 439412.

The previous prime is 659101. The next prime is 659137. The reversal of 659121 is 121956.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 659121 - 2¹⁴ = 642737 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 659091 and 659100.

It is not an unprimeable number, because it can be changed into a prime (659101) 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, 109851 + ... + 109856.

It is an arithmetic number, because the mean of its divisors is an integer number (219708).

2⁶⁵⁹¹²¹ is an apocalyptic number.

It is an amenable number.

659121 is a deficient number, since it is larger than the sum of its proper divisors (219711).

659121 is a wasteful number, since it uses less digits than its factorization.

659121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219710.

The product of its digits is 540, while the sum is 24.

The square root of 659121 is about 811.8626731166. The cubic root of 659121 is about 87.0272077673.

It can be divided in two parts, 659 and 121, that added together give a triangular number (780 = T₃₉).

The spelling of 659121 in words is "six hundred fifty-nine thousand, one hundred twenty-one".