1840459 has 2 divisors, whose sum is σ = 1840460. Its totient is φ = 1840458.

The previous prime is 1840457. The next prime is 1840469. The reversal of 1840459 is 9540481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1840459 - 2¹ = 1840457 is a prime.

Together with 1840457, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1840459.

It is not a weakly prime, because it can be changed into another prime (1840453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920229 + 920230.

It is an arithmetic number, because the mean of its divisors is an integer number (920230).

2^1840459 is an apocalyptic number.

1840459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840459 is an equidigital number, since it uses as much as digits as its factorization.

1840459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1840459 is about 1356.6351757197. The cubic root of 1840459 is about 122.5487020012.

The spelling of 1840459 in words is "one million, eight hundred forty thousand, four hundred fifty-nine".