41356561 has 2 divisors, whose sum is σ = 41356562. Its totient is φ = 41356560.

The previous prime is 41356543. The next prime is 41356591. The reversal of 41356561 is 16565314.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25603600 + 15752961 = 5060^2 + 3969^2 .

It is a cyclic number.

It is not a de Polignac number, because 41356561 - 2⁷ = 41356433 is a prime.

It is not a weakly prime, because it can be changed into another prime (41356591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20678280 + 20678281.

It is an arithmetic number, because the mean of its divisors is an integer number (20678281).

Almost surely, 2^41356561 is an apocalyptic number.

It is an amenable number.

41356561 is a deficient number, since it is larger than the sum of its proper divisors (1).

41356561 is an equidigital number, since it uses as much as digits as its factorization.

41356561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 41356561 is about 6430.9067012358. The cubic root of 41356561 is about 345.8184335898.

The spelling of 41356561 in words is "forty-one million, three hundred fifty-six thousand, five hundred sixty-one".