1840249 has 4 divisors (see below), whose sum is σ = 1866240. Its totient is φ = 1814260.

The previous prime is 1840231. The next prime is 1840259. The reversal of 1840249 is 9420481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9420481 = 7 ⋅1345783.

It is a cyclic number.

It is not a de Polignac number, because 1840249 - 2⁹ = 1839737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1840219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12889 + ... + 13030.

It is an arithmetic number, because the mean of its divisors is an integer number (466560).

2^1840249 is an apocalyptic number.

It is an amenable number.

1840249 is a deficient number, since it is larger than the sum of its proper divisors (25991).

1840249 is an equidigital number, since it uses as much as digits as its factorization.

1840249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25990.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1840249 is about 1356.5577761378. The cubic root of 1840249 is about 122.5440408078.

The spelling of 1840249 in words is "one million, eight hundred forty thousand, two hundred forty-nine".