43724245 has 8 divisors (see below), whose sum is σ = 53749080. Its totient is φ = 34126080.

The previous prime is 43724243. The next prime is 43724273. The reversal of 43724245 is 54242734.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4674244 + 39050001 = 2162^2 + 6249^2 .

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

It is not a de Polignac number, because 43724245 - 2¹ = 43724243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43724243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106440 + ... + 106849.

It is an arithmetic number, because the mean of its divisors is an integer number (6718635).

Almost surely, 2^43724245 is an apocalyptic number.

It is an amenable number.

43724245 is a deficient number, since it is larger than the sum of its proper divisors (10024835).

43724245 is a wasteful number, since it uses less digits than its factorization.

43724245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213335.

The product of its digits is 26880, while the sum is 31.

The square root of 43724245 is about 6612.4310960493. The cubic root of 43724245 is about 352.2957789626.

Adding to 43724245 its reverse (54242734), we get a palindrome (97966979).

The spelling of 43724245 in words is "forty-three million, seven hundred twenty-four thousand, two hundred forty-five".