40421321 has 4 divisors (see below), whose sum is σ = 40435200. Its totient is φ = 40407444.

The previous prime is 40421317. The next prime is 40421323. The reversal of 40421321 is 12312404.

40421321 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40421321 - 2² = 40421317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40421321.

It is not an unprimeable number, because it can be changed into a prime (40421323) 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, 701 + ... + 9018.

It is an arithmetic number, because the mean of its divisors is an integer number (10108800).

Almost surely, 2^40421321 is an apocalyptic number.

It is an amenable number.

40421321 is a deficient number, since it is larger than the sum of its proper divisors (13879).

40421321 is an equidigital number, since it uses as much as digits as its factorization.

40421321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13878.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40421321 is about 6357.7764194725. The cubic root of 40421321 is about 343.1917459568.

Adding to 40421321 its reverse (12312404), we get a palindrome (52733725).

The spelling of 40421321 in words is "forty million, four hundred twenty-one thousand, three hundred twenty-one".