41440021 has 4 divisors (see below), whose sum is σ = 47360032. Its totient is φ = 35520012.

The previous prime is 41440019. The next prime is 41440039. The reversal of 41440021 is 12004414.

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 41440021 - 2¹ = 41440019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 41439977 and 41440004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41440921) 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, 2959995 + ... + 2960008.

It is an arithmetic number, because the mean of its divisors is an integer number (11840008).

Almost surely, 2^41440021 is an apocalyptic number.

It is an amenable number.

41440021 is a deficient number, since it is larger than the sum of its proper divisors (5920011).

41440021 is an equidigital number, since it uses as much as digits as its factorization.

41440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5920010.

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

The square root of 41440021 is about 6437.3924068679. The cubic root of 41440021 is about 346.0509046691.

Adding to 41440021 its reverse (12004414), we get a palindrome (53444435).

The spelling of 41440021 in words is "forty-one million, four hundred forty thousand, twenty-one".