40021043 has 16 divisors (see below), whose sum is σ = 44108064. Its totient is φ = 36157440.

The previous prime is 40021021. The next prime is 40021061. The reversal of 40021043 is 34012004.

It is a cyclic number.

It is not a de Polignac number, because 40021043 - 2⁸ = 40020787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40021243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46271 + ... + 47127.

It is an arithmetic number, because the mean of its divisors is an integer number (2756754).

Almost surely, 2^40021043 is an apocalyptic number.

40021043 is a deficient number, since it is larger than the sum of its proper divisors (4087021).

40021043 is a wasteful number, since it uses less digits than its factorization.

40021043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 40021043 is about 6326.2186968204. The cubic root of 40021043 is about 342.0551505283.

Adding to 40021043 its reverse (34012004), we get a palindrome (74033047).

The spelling of 40021043 in words is "forty million, twenty-one thousand, forty-three".