1440823 has 2 divisors, whose sum is σ = 1440824. Its totient is φ = 1440822.

The previous prime is 1440811. The next prime is 1440847. The reversal of 1440823 is 3280441.

It is a weak prime.

It is an emirp because it is prime and its reverse (3280441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1440794 and 1440803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720411 + 720412.

It is an arithmetic number, because the mean of its divisors is an integer number (720412).

2^1440823 is an apocalyptic number.

1440823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440823 is an equidigital number, since it uses as much as digits as its factorization.

1440823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1440823 is about 1200.3428676841. The cubic root of 1440823 is about 112.9458324978.

The spelling of 1440823 in words is "one million, four hundred forty thousand, eight hundred twenty-three".