43040642 has 6 divisors (see below), whose sum is σ = 64574883.
Its totient is φ = 21515682.
The previous prime is 43040609. The next prime is 43040653. The reversal of 43040642 is 24604034.
It is a happy number.
It can be written as a sum of positive squares in only one way, i.e., 21520321 + 21520321 = 4639^2 + 4639^2
It is an ABA number since it can be written as A⋅BA, here for A=2, B=4639.
It is a Duffinian number.
It is an unprimeable number.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6959 + ... + 11597.
Almost surely, 243040642 is an apocalyptic number.
43040642 is a deficient number, since it is larger than the sum of its proper divisors (21534241).
43040642 is an frugal number, since it uses more digits than its factorization.
43040642 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 9280 (or 4641 counting only the distinct ones).
The product of its (nonzero) digits is 2304, while the sum is 23.
The square root of 43040642 is about 6560.5367158488.
The cubic root of 43040642 is about 350.4501473321.
Adding to 43040642 its reverse (24604034), we get a palindrome (67644676).
The spelling of 43040642 in words is "forty-three million, forty thousand, six hundred forty-two".