43009121 has 8 divisors (see below), whose sum is σ = 44857344. Its totient is φ = 41189760.

The previous prime is 43009081. The next prime is 43009139. The reversal of 43009121 is 12190034.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43009121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43009093 and 43009102.

It is not an unprimeable number, because it can be changed into a prime (43009151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4145 + ... + 10158.

It is an arithmetic number, because the mean of its divisors is an integer number (5607168).

Almost surely, 2^43009121 is an apocalyptic number.

It is an amenable number.

43009121 is a deficient number, since it is larger than the sum of its proper divisors (1848223).

43009121 is a wasteful number, since it uses less digits than its factorization.

43009121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14431.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 43009121 is about 6558.1339571558. The cubic root of 43009121 is about 350.3645752128.

Adding to 43009121 its reverse (12190034), we get a palindrome (55199155).

The spelling of 43009121 in words is "forty-three million, nine thousand, one hundred twenty-one".