43473121 has 4 divisors (see below), whose sum is σ = 45761200. Its totient is φ = 41185044.

The previous prime is 43473119. The next prime is 43473173. The reversal of 43473121 is 12137434.

43473121 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, and also an emirpimes, since its reverse is a distinct semiprime: 12137434 = 2 ⋅6068717.

It is a cyclic number.

It is not a de Polignac number, because 43473121 - 2¹ = 43473119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43473421) 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, 1144011 + ... + 1144048.

It is an arithmetic number, because the mean of its divisors is an integer number (11440300).

Almost surely, 2^43473121 is an apocalyptic number.

It is an amenable number.

43473121 is a deficient number, since it is larger than the sum of its proper divisors (2288079).

43473121 is a wasteful number, since it uses less digits than its factorization.

43473121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288078.

The product of its digits is 2016, while the sum is 25.

The square root of 43473121 is about 6593.4149725313. The cubic root of 43473121 is about 351.6200300032.

The spelling of 43473121 in words is "forty-three million, four hundred seventy-three thousand, one hundred twenty-one".