1941409 has 2 divisors, whose sum is σ = 1941410. Its totient is φ = 1941408.

The previous prime is 1941403. The next prime is 1941419. The reversal of 1941409 is 9041491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 91809 = 1360^2 + 303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1941409 - 2⁵ = 1941377 is a prime.

It is not a weakly prime, because it can be changed into another prime (1941403) 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 as a sum of consecutive naturals, namely, 970704 + 970705.

It is an arithmetic number, because the mean of its divisors is an integer number (970705).

2^1941409 is an apocalyptic number.

It is an amenable number.

1941409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1941409 is an equidigital number, since it uses as much as digits as its factorization.

1941409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1941409 is about 1393.3445374350. The cubic root of 1941409 is about 124.7495572291.

The spelling of 1941409 in words is "one million, nine hundred forty-one thousand, four hundred nine".