43121 has 8 divisors (see below), whose sum is σ = 48384. Its totient is φ = 38160.

The previous prime is 43117. The next prime is 43133. The reversal of 43121 is 12134.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43121 - 2² = 43117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (43151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350 + ... + 456.

It is an arithmetic number, because the mean of its divisors is an integer number (6048).

2⁴³¹²¹ is an apocalyptic number.

It is an amenable number.

43121 is a deficient number, since it is larger than the sum of its proper divisors (5263).

43121 is a wasteful number, since it uses less digits than its factorization.

43121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151.

The product of its digits is 24, while the sum is 11.

The square root of 43121 is about 207.6559654814. The cubic root of 43121 is about 35.0668111592.

Adding to 43121 its reverse (12134), we get a palindrome (55255).

It can be divided in two parts, 4 and 3121, that added together give a 5-th power (3125 = 5⁵).

The spelling of 43121 in words is "forty-three thousand, one hundred twenty-one", and thus it is an iban number.