43740321 has 8 divisors (see below), whose sum is σ = 58707264. Its totient is φ = 28966800.

The previous prime is 43740271. The next prime is 43740329. The reversal of 43740321 is 12304734.

43740321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 43740321 - 2²¹ = 41643169 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43740291 and 43740300.

It is not an unprimeable number, because it can be changed into a prime (43740329) 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 7 ways as a sum of consecutive naturals, for example, 47826 + ... + 48731.

It is an arithmetic number, because the mean of its divisors is an integer number (7338408).

Almost surely, 2^43740321 is an apocalyptic number.

It is an amenable number.

43740321 is a deficient number, since it is larger than the sum of its proper divisors (14966943).

43740321 is a wasteful number, since it uses less digits than its factorization.

43740321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96711.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 43740321 is about 6613.6465735629. The cubic root of 43740321 is about 352.3389496184.

The spelling of 43740321 in words is "forty-three million, seven hundred forty thousand, three hundred twenty-one".