41406561 has 24 divisors (see below), whose sum is σ = 69323904. Its totient is φ = 23325120.

The previous prime is 41406557. The next prime is 41406581. The reversal of 41406561 is 16560414.

41406561 is a `hidden beast` number, since 4 + 1 + 4 + 0 + 656 + 1 = 666.

41406561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 41406561 - 2² = 41406557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (41406551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156 + ... + 9101.

It is an arithmetic number, because the mean of its divisors is an integer number (2888496).

Almost surely, 2^41406561 is an apocalyptic number.

It is an amenable number.

41406561 is a deficient number, since it is larger than the sum of its proper divisors (27917343).

41406561 is a wasteful number, since it uses less digits than its factorization.

41406561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9341 (or 9338 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 41406561 is about 6434.7930036638. The cubic root of 41406561 is about 345.9577420631.

Adding to 41406561 its reverse (16560414), we get a palindrome (57966975).

It can be divided in two parts, 4140 and 6561, that added together give a palindrome (10701).

The spelling of 41406561 in words is "forty-one million, four hundred six thousand, five hundred sixty-one".