409841 has 2 divisors, whose sum is σ = 409842. Its totient is φ = 409840.

The previous prime is 409831. The next prime is 409861. The reversal of 409841 is 148904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 336400 + 73441 = 580^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 409841 - 2⁶ = 409777 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 409841.

It is not a weakly prime, because it can be changed into another prime (409831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204920 + 204921.

It is an arithmetic number, because the mean of its divisors is an integer number (204921).

2⁴⁰⁹⁸⁴¹ is an apocalyptic number.

It is an amenable number.

409841 is a deficient number, since it is larger than the sum of its proper divisors (1).

409841 is an equidigital number, since it uses as much as digits as its factorization.

409841 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 26.

The square root of 409841 is about 640.1882535630. The cubic root of 409841 is about 74.2799838845.

The spelling of 409841 in words is "four hundred nine thousand, eight hundred forty-one".