40441021 has 4 divisors (see below), whose sum is σ = 40460992. Its totient is φ = 40421052.

The previous prime is 40441007. The next prime is 40441031. The reversal of 40441021 is 12014404.

40441021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40441021 - 2¹⁵ = 40408253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40440986 and 40441004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40441031) 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 3 ways as a sum of consecutive naturals, for example, 6555 + ... + 11128.

It is an arithmetic number, because the mean of its divisors is an integer number (10115248).

Almost surely, 2^40441021 is an apocalyptic number.

It is an amenable number.

40441021 is a deficient number, since it is larger than the sum of its proper divisors (19971).

40441021 is a wasteful number, since it uses less digits than its factorization.

40441021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19970.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 40441021 is about 6359.3255145495. The cubic root of 40441021 is about 343.2474902949.

Adding to 40441021 its reverse (12014404), we get a palindrome (52455425).

The spelling of 40441021 in words is "forty million, four hundred forty-one thousand, twenty-one".