1841409 has 6 divisors (see below), whose sum is σ = 2659826. Its totient is φ = 1227600.

The previous prime is 1841401. The next prime is 1841429. The reversal of 1841409 is 9041481.

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 138384 = 1305^2 + 372^2 .

It is not a de Polignac number, because 1841409 - 2³ = 1841401 is a prime.

It is a Duffinian number.

1841409 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1841401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102292 + ... + 102309.

2^1841409 is an apocalyptic number.

It is an amenable number.

1841409 is a deficient number, since it is larger than the sum of its proper divisors (818417).

1841409 is a wasteful number, since it uses less digits than its factorization.

1841409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204607 (or 204604 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1841409 is about 1356.9852615264. The cubic root of 1841409 is about 122.5697839236.

The spelling of 1841409 in words is "one million, eight hundred forty-one thousand, four hundred nine".