1849381 has 2 divisors, whose sum is σ = 1849382. Its totient is φ = 1849380.

The previous prime is 1849357. The next prime is 1849391. The reversal of 1849381 is 1839481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1846881 + 2500 = 1359^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 1849381 - 2⁵ = 1849349 is a prime.

It is a super-2 number, since 2×1849381² = 6840420166322, which contains 22 as substring.

1849381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1849391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 924690 + 924691.

It is an arithmetic number, because the mean of its divisors is an integer number (924691).

2^1849381 is an apocalyptic number.

It is an amenable number.

1849381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1849381 is an equidigital number, since it uses as much as digits as its factorization.

1849381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 1849381 is about 1359.9194829107. The cubic root of 1849381 is about 122.7464094696.

The spelling of 1849381 in words is "one million, eight hundred forty-nine thousand, three hundred eighty-one".