43409745 has 12 divisors (see below), whose sum is σ = 75243636. Its totient is φ = 23151840.

The previous prime is 43409713. The next prime is 43409761. The reversal of 43409745 is 54790434.

It can be written as a sum of positive squares in 2 ways, for example, as 4359744 + 39050001 = 2088^2 + 6249^2 .

It is not a de Polignac number, because 43409745 - 2⁵ = 43409713 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 482286 + ... + 482375.

It is an arithmetic number, because the mean of its divisors is an integer number (6270303).

Almost surely, 2^43409745 is an apocalyptic number.

43409745 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43409745 is a deficient number, since it is larger than the sum of its proper divisors (31833891).

43409745 is a wasteful number, since it uses less digits than its factorization.

43409745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964672 (or 964669 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 43409745 is about 6588.6072124539. The cubic root of 43409745 is about 351.4490806279.

The spelling of 43409745 in words is "forty-three million, four hundred nine thousand, seven hundred forty-five".