40421441 has 4 divisors (see below), whose sum is σ = 40434432. Its totient is φ = 40408452.

The previous prime is 40421413. The next prime is 40421443. The reversal of 40421441 is 14412404.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-40421441 is a prime.

It is a Duffinian number.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (40421443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256 + ... + 9078.

It is an arithmetic number, because the mean of its divisors is an integer number (10108608).

Almost surely, 2^40421441 is an apocalyptic number.

It is an amenable number.

40421441 is a deficient number, since it is larger than the sum of its proper divisors (12991).

40421441 is an equidigital number, since it uses as much as digits as its factorization.

40421441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12990.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 40421441 is about 6357.7858567272. The cubic root of 40421441 is about 343.1920855710.

Adding to 40421441 its reverse (14412404), we get a palindrome (54833845).

The spelling of 40421441 in words is "forty million, four hundred twenty-one thousand, four hundred forty-one".