43021012 has 6 divisors (see below), whose sum is σ = 75286778. Its totient is φ = 21510504.

The previous prime is 43020961. The next prime is 43021019. The reversal of 43021012 is 21012034.

It can be written as a sum of positive squares in only one way, i.e., 39388176 + 3632836 = 6276^2 + 1906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43020983 and 43021001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43021019) by changing a digit.

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 as a sum of consecutive naturals, namely, 5377623 + ... + 5377630.

Almost surely, 2^43021012 is an apocalyptic number.

It is an amenable number.

43021012 is a deficient number, since it is larger than the sum of its proper divisors (32265766).

43021012 is a wasteful number, since it uses less digits than its factorization.

43021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10755257 (or 10755255 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 43021012 is about 6559.0404786066. The cubic root of 43021012 is about 350.3968613975.

Adding to 43021012 its reverse (21012034), we get a palindrome (64033046).

The spelling of 43021012 in words is "forty-three million, twenty-one thousand, twelve".