43121201 has 4 divisors (see below), whose sum is σ = 43147632. Its totient is φ = 43094772.

The previous prime is 43121189. The next prime is 43121207. The reversal of 43121201 is 10212134.

43121201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-43121201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43121207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10595 + ... + 14088.

It is an arithmetic number, because the mean of its divisors is an integer number (10786908).

Almost surely, 2^43121201 is an apocalyptic number.

It is an amenable number.

43121201 is a deficient number, since it is larger than the sum of its proper divisors (26431).

43121201 is a wasteful number, since it uses less digits than its factorization.

43121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26430.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 43121201 is about 6566.6735109947. The cubic root of 43121201 is about 350.6686564477.

Adding to 43121201 its reverse (10212134), we get a palindrome (53333335).

The spelling of 43121201 in words is "forty-three million, one hundred twenty-one thousand, two hundred one".