1405841 has 2 divisors, whose sum is σ = 1405842. Its totient is φ = 1405840.

The previous prime is 1405823. The next prime is 1405879. The reversal of 1405841 is 1485041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 355216 = 1025^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405841 - 2¹⁸ = 1143697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1405801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702920 + 702921.

It is an arithmetic number, because the mean of its divisors is an integer number (702921).

2^1405841 is an apocalyptic number.

It is an amenable number.

1405841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405841 is an equidigital number, since it uses as much as digits as its factorization.

1405841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1405841 is about 1185.6816604806. The cubic root of 1405841 is about 112.0242560135.

The spelling of 1405841 in words is "one million, four hundred five thousand, eight hundred forty-one".