43121147 has 4 divisors (see below), whose sum is σ = 43311336. Its totient is φ = 42930960.

The previous prime is 43121101. The next prime is 43121189. The reversal of 43121147 is 74112134.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43121147 - 2¹⁰ = 43120123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43121747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94754 + ... + 95207.

It is an arithmetic number, because the mean of its divisors is an integer number (10827834).

Almost surely, 2^43121147 is an apocalyptic number.

43121147 is a deficient number, since it is larger than the sum of its proper divisors (190189).

43121147 is a wasteful number, since it uses less digits than its factorization.

43121147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190188.

The product of its digits is 672, while the sum is 23.

The square root of 43121147 is about 6566.6693993226. The cubic root of 43121147 is about 350.6685100687.

The spelling of 43121147 in words is "forty-three million, one hundred twenty-one thousand, one hundred forty-seven".