40441421 has 4 divisors (see below), whose sum is σ = 40506144. Its totient is φ = 40376700.

The previous prime is 40441409. The next prime is 40441459. The reversal of 40441421 is 12414404.

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.

It is a cyclic number.

It is not a de Polignac number, because 40441421 - 2¹⁰ = 40440397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40441393 and 40441402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40441721) 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, 31415 + ... + 32676.

It is an arithmetic number, because the mean of its divisors is an integer number (10126536).

Almost surely, 2^40441421 is an apocalyptic number.

It is an amenable number.

40441421 is a deficient number, since it is larger than the sum of its proper divisors (64723).

40441421 is an equidigital number, since it uses as much as digits as its factorization.

40441421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64722.

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

The square root of 40441421 is about 6359.3569643479. The cubic root of 40441421 is about 343.2486219721.

Adding to 40441421 its reverse (12414404), we get a palindrome (52855825).

The spelling of 40441421 in words is "forty million, four hundred forty-one thousand, four hundred twenty-one".