41578421 has 4 divisors (see below), whose sum is σ = 42283200. Its totient is φ = 40873644.

The previous prime is 41578399. The next prime is 41578423. The reversal of 41578421 is 12487514.

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 41578421 - 2²² = 37384117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41578423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352301 + ... + 352418.

It is an arithmetic number, because the mean of its divisors is an integer number (10570800).

Almost surely, 2^41578421 is an apocalyptic number.

It is an amenable number.

41578421 is a deficient number, since it is larger than the sum of its proper divisors (704779).

41578421 is an equidigital number, since it uses as much as digits as its factorization.

41578421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704778.

The product of its digits is 8960, while the sum is 32.

The square root of 41578421 is about 6448.1331406850. The cubic root of 41578421 is about 346.4357196790.

The spelling of 41578421 in words is "forty-one million, five hundred seventy-eight thousand, four hundred twenty-one".