41421409 has 2 divisors, whose sum is σ = 41421410. Its totient is φ = 41421408.

The previous prime is 41421407. The next prime is 41421433. The reversal of 41421409 is 90412414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40602384 + 819025 = 6372^2 + 905^2 .

It is a cyclic number.

It is not a de Polignac number, because 41421409 - 2¹ = 41421407 is a prime.

Together with 41421407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (41421403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20710704 + 20710705.

It is an arithmetic number, because the mean of its divisors is an integer number (20710705).

Almost surely, 2^41421409 is an apocalyptic number.

It is an amenable number.

41421409 is a deficient number, since it is larger than the sum of its proper divisors (1).

41421409 is an equidigital number, since it uses as much as digits as its factorization.

41421409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 41421409 is about 6435.9466281193. The cubic root of 41421409 is about 345.9990895094. Note that the first 3 decimals are identical.

The spelling of 41421409 in words is "forty-one million, four hundred twenty-one thousand, four hundred nine".