1381849 has 6 divisors (see below), whose sum is σ = 1607514. Its totient is φ = 1184400.

The previous prime is 1381837. The next prime is 1381859. The reversal of 1381849 is 9481831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1254400 + 127449 = 1120^2 + 357^2 .

It is not a de Polignac number, because 1381849 - 2⁹ = 1381337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381819) 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 in 5 ways as a sum of consecutive naturals, for example, 14052 + ... + 14149.

It is an arithmetic number, because the mean of its divisors is an integer number (267919).

2^1381849 is an apocalyptic number.

It is an amenable number.

1381849 is a deficient number, since it is larger than the sum of its proper divisors (225665).

1381849 is an equidigital number, since it uses as much as digits as its factorization.

1381849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28215 (or 28208 counting only the distinct ones).

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

The square root of 1381849 is about 1175.5207356742. The cubic root of 1381849 is about 111.3833296033.

The spelling of 1381849 in words is "one million, three hundred eighty-one thousand, eight hundred forty-nine".