1841405 has 8 divisors (see below), whose sum is σ = 2219832. Its totient is φ = 1466368.

The previous prime is 1841401. The next prime is 1841429. The reversal of 1841405 is 5041481.

It can be written as a sum of positive squares in 4 ways, for example, as 1006009 + 835396 = 1003^2 + 914^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1841405 - 2² = 1841401 is a prime.

It is a Duffinian 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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569 + ... + 2001.

It is an arithmetic number, because the mean of its divisors is an integer number (277479).

2^1841405 is an apocalyptic number.

It is an amenable number.

1841405 is a deficient number, since it is larger than the sum of its proper divisors (378427).

1841405 is a wasteful number, since it uses less digits than its factorization.

1841405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695.

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

The square root of 1841405 is about 1356.9837876703. The cubic root of 1841405 is about 122.5696951728.

Adding to 1841405 its reverse (5041481), we get a palindrome (6882886).

The spelling of 1841405 in words is "one million, eight hundred forty-one thousand, four hundred five".